Hide the title of the uninstall alert dialog

Fixes: 126376004
Test: Observation
Change-Id: Id76477b3dee11613dd6d39d48a322746f6cd5a97
diff --git a/packages/PackageInstaller/AndroidManifest.xml b/packages/PackageInstaller/AndroidManifest.xml
index 591cf70..a69b412 100644
--- a/packages/PackageInstaller/AndroidManifest.xml
+++ b/packages/PackageInstaller/AndroidManifest.xml
@@ -93,6 +93,7 @@
 
         <activity android:name=".UninstallerActivity"
                 android:configChanges="orientation|keyboardHidden|screenSize"
+                android:theme="@style/Theme.AlertDialogActivity.NoActionBar"
                 android:excludeFromRecents="true"
                 android:noHistory="true">
             <intent-filter android:priority="1">
diff --git a/packages/PackageInstaller/res/values/themes.xml b/packages/PackageInstaller/res/values/themes.xml
index 6c8e4c5..b11d28b 100644
--- a/packages/PackageInstaller/res/values/themes.xml
+++ b/packages/PackageInstaller/res/values/themes.xml
@@ -24,4 +24,9 @@
     <style name="Theme.AlertDialogActivity"
             parent="@android:style/Theme.DeviceDefault.Light.Dialog.Alert" />
 
+    <style name="Theme.AlertDialogActivity.NoActionBar">
+        <item name="android:windowActionBar">false</item>
+        <item name="android:windowNoTitle">true</item>
+    </style>
+
 </resources>