Merge "AHAL: update doc for prepareToDisconnectExternalDevice." into main am: f1db884971 am: ddb1c493f9

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2889309

Change-Id: I52737b6f64497692bf7fc64ec91c840ab002ae22
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>