Adding tests for blockNumber

+ The ContactsCommon MockContentProvider now supports mocking the
insert method, added necessary tests.
+ Updating tests with changes to MockContentProvider
  + No longer need to call attachInfo on provider
  + Need to explicitly pass null for vararg query parameters when a
    null values are expected.

Bug=26664600

Change-Id: I5316f8ee8bb442aa36d807781124a936f09e0a9c