Allow null scan filters as some existing use cases require them.

Bug: 188630254
Test: atest CtsBluetoothTestCases:android.bluetooth.cts.BluetoothLeScanTest#testBasicBleScan -- --abi arm64-v8a
Tag: #feature
Change-Id: I101bc47c2dec6b06f02622bb9db568fe74db8498
1 file changed
tree: f8bd7eb35fd5934022a83f130daea862d91bd38b
  1. android/