Add context to some strings.

app/src/main/res/values/strings.xml

@@ -2159,6 +2159,7 @@
     <string name="MediaPreviewFragment_read_more_overflow_text">Read More</string>
 
     <!-- MessageNotifier -->
+    <!-- Text shown in a system notification that is used to summarize your notification. The first placeholder is the new message count, and the second placeholder represents the number of unique chats those message appear in. -->
     <string name="MessageNotifier_d_new_messages_in_d_conversations">%1$d new messages in %2$d chats</string>
     <string name="MessageNotifier_most_recent_from_s">Most recent from: %1$s</string>
     <string name="MessageNotifier_locked_message">Locked message</string>
@@ -2903,6 +2904,7 @@
     <string name="preferences_storage__delete_older_messages">Delete older messages?</string>
     <string name="preferences_storage__clear_message_history">Clear message history?</string>
     <string name="preferences_storage__this_will_permanently_delete_all_message_history_and_media">This will permanently delete all message history and media from your device that are older than %1$s.</string>
+    <!-- The body of an alert dialog that is shown when confirming a trim operation. Trimming will delete all but the most recent messages in a chat. The placeholder represents how many messages are kept in each chat. All older messages are deleted. -->
     <string name="preferences_storage__this_will_permanently_trim_all_conversations_to_the_d_most_recent_messages">This will permanently trim all chats to the %1$s most recent messages.</string>
     <string name="preferences_storage__this_will_delete_all_message_history_and_media_from_your_device">This will permanently delete all message history and media from your device.</string>
     <string name="preferences_storage__are_you_sure_you_want_to_delete_all_message_history">Are you sure you want to delete all message history?</string>
@@ -3245,6 +3247,7 @@
     <string name="conversation_list_search_description">Search</string>
     <string name="conversation_list__pinned">Pinned</string>
     <string name="conversation_list__chats">Chats</string>
+    <!-- A warning shown in a toast that tells you that you can't pin any more chats. Pinning a chat means keeping the chat at the top of your chat list. The placeholder represents how many chats you're allowed to pin. -->
     <string name="conversation_list__you_can_only_pin_up_to_d_chats">You can only pin up to %1$d chats</string>
 
     <!-- conversation_list_item_view -->
@@ -3293,6 +3296,7 @@
     <!-- conversation_group_options -->
     <string name="convesation_group_options__recipients_list">Recipients list</string>
     <string name="conversation_group_options__delivery">Delivery</string>
+    <!-- Label for a menu item that appears after pressing the three-dot icon in a  -->
     <string name="conversation_group_options__conversation">Chat</string>
     <string name="conversation_group_options__broadcast">Broadcast</string>
 
@@ -3343,10 +3347,12 @@
     <string name="Insights__percent">%</string>
     <string name="Insights__title">Insights</string>
     <string name="InsightsDashboardFragment__title">Insights</string>
+    <!-- Body text for a page describing how many signal messages you've sent. The first placeholder represents the number of signal messages sent, and the second placeholder represents how many days have passed. -->
     <string name="InsightsDashboardFragment__signal_protocol_automatically_protected">Signal Protocol automatically protected %1$d%% of your outgoing messages over the past %2$d days. Chats between Signal users are always end-to-end encrypted.</string>
     <string name="InsightsDashboardFragment__spread_the_word">Spread the word</string>
     <string name="InsightsDashboardFragment__not_enough_data">Not enough data</string>
     <string name="InsightsDashboardFragment__your_insights_percentage_is_calculated_based_on">Your Insights percentage is calculated based on outgoing messages within the past %1$d days that have not disappeared or been deleted.</string>
+    <!-- Label for a button that, when pressed, will begin a chat with a person whose name is showed on the screen. -->
     <string name="InsightsDashboardFragment__start_a_conversation">Start a chat</string>
     <string name="InsightsDashboardFragment__invite_your_contacts">Start communicating securely and enable new features that go beyond the limitations of unencrypted SMS messages by inviting more contacts to join Signal.</string>
     <string name="InsightsDashboardFragment__this_stat_was_generated_locally">These statistics were locally generated on your device and can only be seen by you. They are never transmitted anywhere.</string>
@@ -4401,6 +4407,7 @@
     <string name="ConversationSettingsFragment__group_link">Group link</string>
     <string name="ConversationSettingsFragment__add_as_a_contact">Add as a contact</string>
     <string name="ConversationSettingsFragment__unmute">Unmute</string>
+    <!-- The subtitle for a settings item that describes how long the user's chat is muted. If a chat is muted, you will not receive notifications unless @mentioned. The placeholder represents a time (e.g. 10pm, March 4, etc). -->
     <string name="ConversationSettingsFragment__conversation_muted_until_s">Chat muted until %1$s</string>
     <string name="ConversationSettingsFragment__conversation_muted_forever">Chat muted forever</string>
     <string name="ConversationSettingsFragment__copied_phone_number_to_clipboard">Copied phone number to clipboard.</string>