ANDROID: arm as an option for get_gki_modules_list

If driver config depends on ARM64, driver is not
available for the ARM targets as module.

Introduce arm as an option for get_gki_modules_list()
to separate ARM64 dependent modules.

virtual_device_arm Cuttlefish target is the current
consumer of this; and it fails when there is ARM64
dependent module is introduced like OEM hypervisors.

Bug: 293529933
Test: TH
Change-Id: I462e8968faa48d58721d884688af62ff603c9a3d
Signed-off-by: Ramji Jiyani <ramjiyani@google.com>