Vertical-center bubble preference button content

Fixes: 160517101
Test: manual
Change-Id: I7a6ed455125a655e1199be95d954821dea5e0ace
diff --git a/res/layout/bubble_preference.xml b/res/layout/bubble_preference.xml
index 8a64716..08f25b4 100644
--- a/res/layout/bubble_preference.xml
+++ b/res/layout/bubble_preference.xml
@@ -44,7 +44,7 @@
             android:id="@+id/bubble_all_icon"
             android:src="@drawable/ic_bubble_all"
             android:background="@android:color/transparent"
-            android:layout_gravity="center"
+            android:layout_centerVertical="true"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:clickable="false"
@@ -53,6 +53,7 @@
             android:id="@+id/bubble_all_label"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
             android:ellipsize="end"
             android:maxLines="2"
             android:clickable="false"
@@ -75,7 +76,7 @@
             android:id="@+id/bubble_selected_icon"
             android:src="@drawable/ic_bubble_selected"
             android:background="@android:color/transparent"
-            android:layout_gravity="center"
+            android:layout_centerVertical="true"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:clickable="false"
@@ -84,6 +85,7 @@
             android:id="@+id/bubble_selected_label"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
             android:ellipsize="end"
             android:maxLines="2"
             android:clickable="false"
@@ -106,7 +108,7 @@
             android:id="@+id/bubble_none_icon"
             android:src="@drawable/ic_bubble_none"
             android:background="@android:color/transparent"
-            android:layout_gravity="center"
+            android:layout_centerVertical="true"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:clickable="false"
@@ -115,6 +117,7 @@
             android:id="@+id/bubble_none_label"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
             android:ellipsize="end"
             android:maxLines="2"
             android:clickable="false"
@@ -125,4 +128,4 @@
             android:text="@string/bubble_app_setting_none"/>
     </com.android.settings.notification.NotificationButtonRelativeLayout>
 
-</LinearLayout>
\ No newline at end of file
+</LinearLayout>