Sensors: MultiHal: add support for HIDL

Add get_multi_hal_module_info() to support using multi-hal
functionality within the HIDL sensor implementation.

Move externally relevant constants and prototypes to new multihal.h
file.

Add new Android.bp for Treble to build multi-hal into a static
library that is now included by the HIDL sensor implementation.

Bug: 32022308
Change-Id: I2b3afa9ff1e0a2e5a098e643dde99ec86bb88206
3 files changed