Throw an exception if touch device is not fake touchable

CDD requires touchscreen supporting devices should report both
FEATURE_TOUCHSCREEN and FEATURE_FAKETOUCH.

With this change, when these values are read in WindowManagerInternal,
this condition is checked and an exception is thrown if the device
violates the expectation.

Bug: 183033292
Test: build
Change-Id: Ib0752dec02af8158a52c433a27f3ea702527a706