Fix the bug the qs tile secondary title is using the wrong battery source.

BluetoothDevice.METADATA_MAIN_BATTERY is not suitable for all types of bluetooth devices. We switch to use the battery levels functions provided by CachedBluetoothDevice. Thus metadata listener is replaced with the callback of CachedBluetoothDevice.

Test: com.android.systemui.qs.tiles.BluetoothTileTest
Bug: 397847825
Flag: com.android.settingslib.flags.refactor_battery_level_display
Change-Id: If1850ca785bc1ce62303d875431c6835e6095f89