USBGadgetHAL: Read supported compositions from file

Parse the vid/pid compositions from file /vendor/etc/usb_compositions.conf
placed on device.

Change-Id: I96b7298de91b770dd17ea2f288ceb719f745869d
4 files changed
tree: 37b49e586f172ae08216bed96b3172e095214d7a
  1. etc/
  2. hal/
  3. vendor_product.mk