MediaProvider: support streaming bookmark

Add bookmarks table and bookmark URI.

CRs-Fixed: 637282
Change-Id: I4414a1619066efe58457350a82394d56d26d41bb
MediaProvider: Avoid issue of android.process.media stop

"OK" and "Cancel" button's click event response at the same time
lead to FATAL EXCEPTION. Make the click events do not happen at
the same time.

CRs-Fixed: 513752
Change-Id: I92fc1dc15be42d0bd9fe54f41fdbb26b3ca4b85c