Add 2 APIs (suspend and resume) in MediaPlayer

- API:suspend() will just pause the player and release all the decoders
- instead of release the whole player
- API:resume() will just init the decoders again
- Add a check in onVideoEvent()
- to make sure the first seek operation will seek the next i-frame

Change-Id: Ia4716f7fb3a412eb19c6ded9c0f3056d0490546c

Implement the suspend/resume operation in VideoView

- Using the new APIs in Mediaplayer
  to implement the suspend/resume operation in VideoView
- Add a new status "SUSPENDED"

Change-Id: I00f9daa2d34b3b125b8c3b968bc581708ab2cdf4

HTML5 VideoView change to use the new APIs: suspend/resume

- While suspend and resume, using the new APIs in Mediaplayer

Change-Id: I8530b533501607f681145853d7923fdf2009150b
webkit: Manage video playing state properly when browser goes to background

Issue: Browser App Video streaming not pausing while pressing home Button

Fix : When the Browser goes to the background while the video is playing
      in the fullscreen, the fullscreen mode is exited. While exiting
      the full screen mode the video state is handled properly. So that
      there is no playback in the background.

CRs-Fixed: 509225

Change-Id: I32c306923d2638731d34d216cf006050ce4ad825