Update build configuration

- Change package name to com.android.email
- Change src path to com/android/email
- Add a clean spec
- Move all files under src-mailcommon to src

Change-Id: I4431c7a22e08c0360c49404d591e212803267679
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 019a77e..e86cd30 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-      package="com.google.android.unifiedemail"
+      package="com.android.email"
       android:versionCode="1"
       android:versionName="1.0">