Automatic versioning for Camera.

  Bug: 10461009

This is the scheme copied from GMS Core and modified by Babel, which
allows us to generate version number more easily and also incorporate
build numbers into it.

Change-Id: I6ed4bf03e545a22423cb9936a5fcb67a50133490
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 3469717..1b082e4 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1,9 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.android.camera2"
-    android:versionCode="1"
-    android:versionName="2.0" >
+    package="com.android.camera2">
 
     <uses-sdk
         android:minSdkVersion="14"