Add getActiveNotifications to existing NoMan tests.

This has the dual benefit of testing the new API (requires
change I8cd61095 in frameworks/base) as well as providing
programmatic test of the old API rather than relying on
human verification (or just hoping everything worked).

Change-Id: Ieb6b2c50cf022f789edf65038156aad6d4f52133
1 file changed