chrome.bluetoothLowEnergy: Implement getCharacteristics.
This CL implements the getCharacteristics method of the bluetoothLowEnergy API
and adds a mapping for Characteristic instance IDs to
BluetoothLowEnergyEventRouter.
BUG=
265663
TEST=browser_tests --gtest_filter=BluetoothLowEnergyApiTest.*
Committed:
https://src.chromium.org/viewvc/chrome?view=rev&revision=268009