Rename getSurfaceTransformHint API and switch to using NDK transform constants

NDK exposes ANativeWindowTransform/NATIVE_WINDOW_TRANSFORM_*. These
constants are aligned with HAL definitions and are used internally to
specify buffer transforms. Native consumers of the transform hint
 are expected to generate ANativeWindowTransform from the hint.

Aligning the SDK and the NDK transform values will make the API
less confusing.

Bug: 196167822
Test: atest AttachedSurfaceControlTest
Change-Id: Ib20be045f6c8c6d7befef93a839a27098da55ffa