Add classes/methods used by Settings robo tests

Add classes/methods used by Settings robolectric tests under:
//packages/apps/Settings/tests/robotests

Note this only fixes compilation to progress switching
over to CorePlatformApi stubs by default. There will almost
certainly be more work here if we enforce the API at runtime
and the settings code may need to be rewritten eventually.

Bug: 113148576
Test: build
Change-Id: I7dc4107c3fad6439a834e7324a5815445bc7ad93
3 files changed