Bug fix for building the hover target list

lastHoverTarget should be updated even though lastHoverTarget is not null.
If not, the hover target list cannot have more than one hover target.

Change-Id: I21b49e8cbf3657321b2f1f2c20a3bdeb7f07bd48
Signed-off-by: Sangkyu Lee <sk82.lee@lge.com>
Remove lag when launching an app
Fix AMotionEvent_getHistorical* to take const AInputEvent* motion_event

See b.android.com/55873

Change-Id: Idff7b71480991e16f57e55748fafa57d5827b10b
Add missing ACTION_MEDIA_UNMOUNTED intent

When an SD card is removed without the user unmounting, the intent
ACTION_MEDIA_BAD_REMOVAL is fired but is missing the preceeding
ACTION_MEDIA_UNMOUNTED which is needed to keep UI consistency.

Now when bad media removal is detected an ACTION_MEDIA_UNMOUNTED
intent is sent before the ACTION_MEDIA_BAD_REMOVAL.

Change-Id: I133300f42bafab141351e796d7cfc13c15d133e0