Apollo: fix a race condition when two fingers are on the screen

* unconditionally allow begin fake drag when the on touch down
JIRA: BUGDUMP-820

Change-Id: I67824ec6d01011907ff763bb0dc23362d753ac4c
Apollo: Correctly handle opening invalid files.

In that case, mCurrentPlayer is invalid, which means setNextDataSource()
shouldn't be called for it.

JIRA: BUGDUMP-1050
Change-Id: Ia8215c3643b1eb7f8b5786eeb8267340b673939c
Build fix.

Change-Id: I44f972d13686231103199db622b91afdacefb352
Automatic translation import

Change-Id: I10325371d640ed26a3120a45df1ebf3204253416