MoviePlayer: Flush UI display after suspend/resume

- Post mPlayingCheck again in onResume() for HTTP streaming
- To disable the "Loading" pattern after resume

Change-Id: Ic0e5bd0bb0710d76f41a40249022526b4d4e71db
Gallery2: add extra mimetypes to gallery manifest

- Add extra mimetypes so they can be used for streaming

Change-Id: I1df1b011ee54b646f23cfe3faa206c0aac41a838
CRs-Fixed: 620381
Gallery2: reduce post delay time

Currently there is 500ms of delay added in Video view that adds to
app playback startup latency time. Reducing this delay to 50ms helps
in reducing the startup latency.

Change-Id: If1db674a66d68b94654868fd3e4d5c84ea5265e7