Add initial implementation of calls tab behind a feature flag.

app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java

@@ -106,6 +106,7 @@ public final class FeatureFlags {
   private static final String PAYPAL_RECURRING_DONATIONS        = "android.recurringPayPalDonations.3";
   private static final String TEXT_FORMATTING                   = "android.textFormatting";
   private static final String ANY_ADDRESS_PORTS_KILL_SWITCH     = "android.calling.fieldTrial.anyAddressPortsKillSwitch";
+  private static final String CALLS_TAB                         = "android.calls.tab";
 
   /**
    * We will only store remote values for flags in this set. If you want a flag to be controllable
@@ -162,7 +163,8 @@ public final class FeatureFlags {
       PAYPAL_ONE_TIME_DONATIONS,
       PAYPAL_RECURRING_DONATIONS,
       TEXT_FORMATTING,
-      ANY_ADDRESS_PORTS_KILL_SWITCH
+      ANY_ADDRESS_PORTS_KILL_SWITCH,
+      CALLS_TAB
   );
 
   @VisibleForTesting
@@ -584,6 +586,13 @@ public final class FeatureFlags {
     return getBoolean(ANY_ADDRESS_PORTS_KILL_SWITCH, false);
   }
 
+  /**
+   * Whether or not the calls tab is enabled
+   */
+  public static boolean callsTab() {
+    return getBoolean(CALLS_TAB, false);
+  }
+
   /** Only for rendering debug info. */
   public static synchronized @NonNull Map<String, Object> getMemoryValues() {
     return new TreeMap<>(REMOTE_VALUES);

app/src/main/java/org/thoughtcrime/securesms/util/ViewExtensions.kt

@@ -1,6 +1,8 @@
 package org.thoughtcrime.securesms.util
 
 import android.view.View
+import android.widget.TextView
+import androidx.annotation.DrawableRes
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.constraintlayout.widget.ConstraintSet
 
@@ -28,3 +30,17 @@ inline fun View.doOnEachLayout(crossinline action: (view: View) -> Unit): View.O
   addOnLayoutChangeListener(listener)
   return listener
 }
+
+fun TextView.setRelativeDrawables(
+  @DrawableRes start: Int = 0,
+  @DrawableRes top: Int = 0,
+  @DrawableRes bottom: Int = 0,
+  @DrawableRes end: Int = 0
+) {
+  setCompoundDrawablesRelativeWithIntrinsicBounds(
+    start,
+    top,
+    end,
+    bottom
+  )
+}