Toggle orientation sensor outside of WM lock

Otherwise when turning on/off, the toggling of orientation sensor
may spend time in IPC to HIDL::ISensors, which may block other
callers to window manager service.

Now the enable/disable are moved to the same thread (android.ui)
that receives sensor events.

Also remove UpdateRunnable because onProposedRotationChanged is
already called on the handler thread. The original code just posts
one more time.

Bug: 225183104
Test: atest DisplayRotationTests
Change-Id: I3d3b774fae1f5981533b79ebdbf6f651c803d511