Themed conversation mute icon.

res/drawable/ic_mute.xml

@@ -2,8 +2,9 @@
     android:width="512dp"
     android:height="512dp"
     android:viewportWidth="512"
-    android:viewportHeight="512">
+    android:viewportHeight="512"
+    android:tint="?attr/colorControlNormal">
   <path
       android:pathData="M215.03,71.05L126.06,160H24c-13.26,0 -24,10.74 -24,24v144c0,13.25 10.74,24 24,24h102.06l88.97,88.95c15.03,15.03 40.97,4.47 40.97,-16.97V88.02c0,-21.46 -25.96,-31.98 -40.97,-16.97zM461.64,256l45.64,-45.64c6.3,-6.3 6.3,-16.52 0,-22.82l-22.82,-22.82c-6.3,-6.3 -16.52,-6.3 -22.82,0L416,210.36l-45.64,-45.64c-6.3,-6.3 -16.52,-6.3 -22.82,0l-22.82,22.82c-6.3,6.3 -6.3,16.52 0,22.82L370.36,256l-45.63,45.63c-6.3,6.3 -6.3,16.52 0,22.82l22.82,22.82c6.3,6.3 16.52,6.3 22.82,0L416,301.64l45.64,45.64c6.3,6.3 16.52,6.3 22.82,0l22.82,-22.82c6.3,-6.3 6.3,-16.52 0,-22.82L461.64,256z"
-      android:fillColor="#FFFFFF"/>
+      android:fillColor="@android:color/white"/>
 </vector>

res/layout/conversation_activity.xml

@@ -2,6 +2,7 @@
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/rootView"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -43,11 +44,13 @@
 
                     <ImageView
                         android:id="@+id/muteIndicatorImageView"
-                        android:layout_width="12dp"
-                        android:layout_height="12dp"
+                        android:layout_width="16dp"
+                        android:layout_height="16dp"
+                        android:layout_gravity="center"
                         android:src="@drawable/ic_mute"
-                        android:layout_marginRight="4dp"
-                        android:visibility="gone" />
+                        android:layout_marginRight="6dp"
+                        android:visibility="gone"
+                        tools:visibility="visible"/>
 
                     <TextView
                         android:id="@+id/subtitleTextView"