Adding support for launcher preview generation

Creating a utility class which generates a launcher preview
for a provided InvariantDeviceProfile

Bug: 118758696
Change-Id: I0aebeb6eed37f72edd1cc305e58eece305aae3ff
diff --git a/AndroidManifest-common.xml b/AndroidManifest-common.xml
index 1beaea5..9b85784 100644
--- a/AndroidManifest-common.xml
+++ b/AndroidManifest-common.xml
@@ -132,6 +132,16 @@
             </intent-filter>
         </activity>
 
+        <!-- TODO: Remove -->
+        <activity android:name="com.android.launcher3.util.MyActivity"
+            android:theme="@style/AppTheme">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
         <!--
         Should point to the content provider which can be used to dump Launcher3 compatible
         worspace configuration to the dump's file descriptor by using launcher_dump.proto