Changed dialer launch activity style to use a 0dp height actionbar.
This prevents the user from seeing a blue "Phone" actionbar during loading.  DO NOT MERGE

Bug: 13438027
Change-Id: I3d46778a63df15fb9d44bd281e2ef8b20602f677
(cherry picked from commit edd27f498187a7aa09b0c09e8712e5c1309d39b2)
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 0f3285e..3a643a8 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -67,7 +67,7 @@
              dialpad screen. -->
         <activity android:name=".DialtactsActivity"
             android:label="@string/launcherDialer"
-            android:theme="@style/DialtactsTheme"
+            android:theme="@style/DialtactsThemeHiddenActionBar"
             android:launchMode="singleTask"
             android:clearTaskOnLaunch="true"
             android:icon="@mipmap/ic_launcher_phone"
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 207ab6b..1025d0f 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -77,6 +77,18 @@
         <item name="favorites_padding_bottom">?android:attr/actionBarSize</item>
     </style>
 
+    <!-- An extension of the main DialtactsTheme used when the the launcher activity is shown.
+         Ensures that there is no actionbar showing during the load of the dialer app. -->
+    <style name="DialtactsThemeHiddenActionBar" parent="DialtactsTheme">
+        <item name="android:actionBarStyle">@style/DialtactsHiddenActionBarStyle</item>
+    </style>
+
+    <!-- A "hidden" action bar style.  Used when loading the launcher activity so that the
+         default actionbar is effectively hidden. -->
+    <style name="DialtactsHiddenActionBarStyle" parent="DialtactsActionBarStyle">
+        <item name="android:height">0dp</item>
+    </style>
+
     <!-- Action bar overflow menu icon. -->
     <style name="DialtactsActionBarOverflow"
            parent="@android:style/Widget.Holo.ActionButton.Overflow">