Removed bogus Looper.prepare() from onStart().  (DO NOT MERGE)

The instrumentation thread for JUnit tests is not a Looper. It calculates all tests that need to be executed, executes them, and exits, ending the instrumentation.

Bug: 17418699

Change-Id: Idcfdd3369472e01996bfae5564b6cb70c3eb7724
2 files changed