Show immediate progress feedback when creating a local backup.

Co-authored-by: Greyson Parrelli <greyson@signal.org>

app/src/main/java/org/thoughtcrime/securesms/components/settings/app/backups/local/LocalBackupsSettingsCallback.kt

@@ -98,6 +98,7 @@ class DefaultLocalBackupsSettingsCallback(
   override fun onCreateBackupClick() {
     if (BackupUtil.isUserSelectionRequired(fragment.requireContext())) {
       Log.i(TAG, "Queueing backup...")
+      viewModel.onBackupStarted()
       enqueueArchive(false)
     } else {
       Permissions.with(fragment)
@@ -105,6 +106,7 @@ class DefaultLocalBackupsSettingsCallback(
         .ifNecessary()
         .onAllGranted {
           Log.i(TAG, "Queuing backup...")
+          viewModel.onBackupStarted()
           enqueueArchive(false)
         }
         .withPermanentDenialDialog(

app/src/main/java/org/thoughtcrime/securesms/components/settings/app/backups/local/LocalBackupsViewModel.kt

@@ -116,6 +116,19 @@ class LocalBackupsViewModel : ViewModel(), BackupKeyCredentialManagerHandler {
     }
   }
 
+  fun onBackupStarted() {
+    val context = AppDependencies.application
+    internalSettingsState.update {
+      it.copy(
+        progress = BackupProgressState.InProgress(
+          summary = context.getString(R.string.BackupsPreferenceFragment__in_progress),
+          percentLabel = context.getString(R.string.BackupsPreferenceFragment__d_so_far, 0),
+          progressFraction = null
+        )
+      )
+    }
+  }
+
   @Subscribe(threadMode = ThreadMode.MAIN)
   fun onBackupEvent(event: LocalBackupV2Event) {
     val context = AppDependencies.application