Ignore incoming <Set Audio Volume Level> messages with out-of-bounds volume

Previously, such messages could cause a TV to change its volume level to
100% at unexpected times, because Playback devices may use <Set Audio
Volume Level>[127] to check whether the TV supports the message.

(The CEC range for volume index is 0 to 100 inclusive. 127 means
"unknown volume".)

Bug: 286559620
Test: atest com.android.server.hdmi.HdmiCecLocalDeviceTvTest#receiveSetAudioVolumeLevel_volumeOutOfBounds_noVolumeChange; manual

Change-Id: Ie1abda753b2a6eaccc54970ff15ba3022ad66b31