Fix the issue the video can't start to play

In full screen mode, we shall not always rely on the auto start info.
If the auto start is false, it will prevent the video from playing.

The auto start should always happen inline mode when prepared.
If we switch into full screen mode while playing, we will also do auto start.

bug:4260063
Change-Id: I4b13c30b1f2c219951dc8edd659e221a21c86c2b