The length calulation for the string "/dev/video" accidentally added one
instead of removing one for null terminated string. This CL fixes the
misplaced sign to get the correct length.
Test: Manually Tested that the length is correct.
Change-Id: I3e5d0cd7df20afdb2db61ac0963c5580722d8b24
Android T migrated the HAL interface to AIDL, but the reference HAL
was never updated to use AIDL. This CL migrates the reference
HAL implementation for external cameras to use AIDL as well. The
external HAL uses V4L2 standard to expose USB cameras to the
cameraserver.
The reference HAL implementation for internal camera was dropped
because it is not possible to write a generic HAL that works with some
large percentage of internal cameras.
Bug: 219974678
Test: Existing CTS tests pass with external camera connected.
Change-Id: I35f3dc32c16670eca7735a4ac00fed3daf36aa65
