This will be enforced by build-time and CTS tests.

Test: build policy
Change-Id: Ie852fa59670969a2352a97be357d37e420fb180e

Move hostapd to vendor/bin/ because it's only used by WIFI HAL.
This commit is for sepolicy corresponding changes.

Bug: 34236942
Bug: 34237659
Test: Hotspot works fine. Integration test.

Change-Id: I2ee165970a20f4015d5d62fc590d448e9acb92c1