Treble GNSS - Removing FlpHardwareProvider

Removal of legacy FlpHardwareProvider jni,
and minimal java implementation.

Restoration of GNSS batching functionality,
with default implementation using
fused_location.h supporting libraries, would
continue in the Treble aligned GNSS HAL.

Bug: 31974439
Test: Ensured that system boots cleanly, and FLP HAL is not used
      and that GPS operation (GMaps & 3rd party test app)
      still looks fine.
Change-Id: I7b3834ddd4e754576af30cdbe2a92f53947d85a7