Migrate sensors VTS to use libui

There is a new graphics.mapper HAL and instead of adding yet another
combination of mapper/allocator, use libui that handles all of that for
us.

Backport requested in b/381205010.

Test: VtsAidlHalSensorsTargetTest
Bug: 304843606
Fixes: 381205010
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9d67c77d35a86fc2b38e563400d1161c30145027)
Merged-In: Icf4a218de6afe0ae77a4520a6f78a4f7da9bedd4
Change-Id: Icf4a218de6afe0ae77a4520a6f78a4f7da9bedd4