Delete media tests

Media files take up a lot of spce. Deleting them cuts the size of frameworks
almost in half.

Change-Id: I3fd1019df8b41404909b7b4df8ad709526ceff36
Signed-off-by: Evan Anderson <evan1124@gmail.com>
Halo PS 16 -> 17

Change-Id: I11b694ecd6a46f745596e32d81479b863ff6c232
PS17: Get the correct activity stack: this makes all windows in the same stack to get the floating mode