Frameworks: Native: Add PowerService support

Added underlying interface for PowerService that allows
sending power hints to PowerHAL.
This call handles the JNI code, and establishes a connection
with the service.

Bug 1155935
Bug 1206410

Change-Id: Ifb2d29c1aaf891159cf1ea3b037321cd41ef7609
Reviewed-on: http://git-master/r/203534

(cherry picked from commit 88509af1e958ab619b54c84f8a793a89af9c2ceb)

Change-Id: Ifb2d29c1aaf891159cf1ea3b037321cd41ef7609
Reviewed-on: http://git-master/r/327316
Reviewed-by: Jean Huang <jeanh@nvidia.com>
Tested-by: Jean Huang <jeanh@nvidia.com>