Remove Google nanoApp references from framework.

Remove references to Google specific code from the framework.
There is code that explictly deals only with Google Nanoapps on
very sepcific devices. Such code should not be in general Android
framework code.

Bug: 29336850
Test: GTS tests pass.
Change-Id: I8c25b0a5b732c36c4a56ce0c2b5d6abf3cb1aa01