Fix KitKat OOM when rendering rounded material buttons.

app/src/main/res/layout/conversation_activity.xml

@@ -41,7 +41,7 @@
                     android:textAllCaps="false"
                     android:visibility="gone"
                     app:backgroundTint="@color/core_white"
-                    app:cornerRadius="1000dp"
+                    app:cornerRadius="@dimen/material_button_full_round_corner_radius"
                     app:icon="@drawable/ic_video_solid_18"
                     app:iconGravity="textStart"
                     tools:iconTint="@color/core_ultramarine"

app/src/main/res/values-v19/dimens.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="material_button_full_round_corner_radius">0dp</dimen>
+</resources>

app/src/main/res/values-v21/dimens.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="material_button_full_round_corner_radius">1000dp</dimen>
+</resources>