Add dumpsys for HIDL broadcastradio service

Dump method of IRadioService is overriden to print information
for debugging BroadcastRadioService.

Bug: 240598856
Test: m -j, adb shell dumpsys broadcastradio
Change-Id: Iad57bb1871e7ee76cc2d401d4b6769dc1d4a0668
Merged-In: Iad57bb1871e7ee76cc2d401d4b6769dc1d4a0668
(cherry picked from commit a6f94338)