Force vrhwc/wm to report the native resolution

Due to some Yak-shaving, this also involved a partial conversion of our
libraries to soong.

Notes:
* I also changed the name of libsensor to libvrsensor to avoid a naming
  clash with an existing library
* The remaining libraries will be soongified in a separate CL

Bug: 36139334
Test: Build and run vr apps.
Change-Id: Ib39687bd01e3d2e1c30adc54e18f362a85954ab9