BT: getCodecMetadata() returns NonNull object in BluetoothLeBroadcastChannelTest

* getCodecMetadata() does not return Nullable objects
* Hence we shouldn't assert its return value to be null

Test: atest android.bluetooth.cts.BluetoothLeBroadcastChannelTest
Bug: 230012910
Fixes: 230012910
Change-Id: Ib44716fa132b77066e9095cd6ecb9c7ed0681206
Merged-In: Ib44716fa132b77066e9095cd6ecb9c7ed0681206
(cherry picked from commit 5eb8bfa925321e0492dbf52f95c0057f5c12c903)
1 file changed