bug:2622719  move 'forcing of cursor execution' to ContentProvider

revert part of the CL: Ia561135e974a44ad3e3774ecb23c6a3d0fc38176
and add it to ContentProvider.query() to force query execution
in worker thread, instead of having the main thread incur the cost
of query execution and potentially get ANR

Change-Id: I0ea8a170bd954a421f4ad825f8090319a83a5b2b
2 files changed