Bug 1217003 - Tabs tray (List): Vertically center tab title. r=margaret

--HG--
extra : commitid : 26D4aT3derL
extra : rebase_source : 56b2a11b4c149bdad1416b22c4642510cf879c88

mobile/android/base/resources/layout/tabs_list_item_view.xml

@@ -44,6 +44,7 @@
                   style="@style/TabLayoutItemTextAppearance"
                   android:textColor="#FFFFFFFF"
                   android:textSize="14sp"
+                  android:gravity="center_vertical"
                   android:singleLine="false"
                   android:maxLines="4"
                   android:duplicateParentState="true"/>