leaudio: Improve set active device

This patch adds missing native code to set active
group and also improves updateActiveDevices() function

Bug: 150670922
Tag: #feature
Sponsor: jpawlowski@
Test: atest BluetoothInstrumentationTests
Change-Id: I84ffabcd0349cea4bd9d99a6cf1a1b339c5c8865
3 files changed
tree: 7d632ca5c76f7b0b36e4be367438b37be0123617
  1. android/