Activity/provider used is restricted to the application's Package, but can be spread...

Activity/provider used is restricted to the application's Package, but can be spread across other packages as well.
A better way to construct the activity name should be by getting the substring from the fully qualified classname
itself and not using the PackageInfo.
Credit:Ritu Srivastava

Change-Id: I9ff5a27d828d5d3836bb55101cb947f670ea5941