Add OWNERS files for hearingaid

Test: N/A
Bug: 311713922
Change-Id: Ib2dd54e9dd8b779255af4e91cd8c2c05ed747da3

OWNERS_hearingaid

+charliebout@google.com
+licorne@google.com

android/app/jni/OWNERS

+per-file com_android_bluetooth_hearing_aid.cpp=file:/OWNERS_hearingaid

android/app/src/com/android/bluetooth/hearingaid/OWNERS

+include /OWNERS_hearingaid

android/app/tests/unit/src/com/android/bluetooth/hearingaid/OWNERS

+include /OWNERS_hearingaid

framework/java/android/bluetooth/OWNERS

+per-file BluetoothHearingAid.java=file:/OWNERS_hearingaid

system/bta/hearing_aid/OWNERS

+include /OWNERS_hearingaid

system/bta/include/OWNERS

+per-file bta_hearing_aid_api.h=file:/OWNERS_hearingaid

system/btif/src/OWNERS

+per-file btif_hearing_aid.cc=file:/OWNERS_hearingaid