Fix issue #44665317: onServiceConnected() not called after...

...apk reinstall; affects user privacy

Disconnecting a ServiceConnection after an app is torn down could
impact the bookkeeping of the same service if it has been started
for the app.

Also address issue #5073927: GSF process can't be killed

A new flag allows the systems location manager service to tell
the activity manager to not pull bound services up forever into
the visible adj level.

Change-Id: I2557eca0e4bd48f3b10007c40ec878e769fd96a8