libaudiohal@aidl: Add dumping of the signal power log

Dumping of the signal power log for each HAL stream is done
in the HIDL wrapper but was missing in the AIDL wrapper.

Bug: 294962274
Test: adb shell dumpsys media.audio_flinger
Change-Id: I0170028111c7a6ad3f80d1efc85b8bda2ab460bb