BluetoothGatt: Skip readPhy() test when not supported

Bug: 226041264
Test: Build
Change-Id: I4e84e1c29693e5ac536e38fa5a4673e61c88f939
(cherry picked from commit 52fab406ced58296b2a62363756200797e614499)
Merged-In: I4e84e1c29693e5ac536e38fa5a4673e61c88f939
2 files changed