Revert "OMS: integrate OverlayManagerService into framework"

Bug: 31052947
Bug: 35697944

This reverts commit 21a3d1ad686dee97b9cf0ed80389ee2ab0d48013.

Change-Id: I2d86931020301524c26cf8c8e80d557c97fdd6c3
(cherry picked from commit 95459806920dec34abb3214ab6e1a9b9213a2a61)
15 files changed