Prepare for easy package name change

After this change, the only places that should need editing
to change the package name are:

- AndroidMainfest.xml, package attribute
- tests/AndroidManifest.xml, package attribute and targetPackage
- tests/src/com/android/quicksearchbox/

A change is also needed in Launcher / Launcher2 to remove the hardcoded
package name for the search widget provider.

Change-Id: Ic5f15cb9900843abac27d4b9c0a4bb360bc1bff9
3 files changed