Set bottom frequency in AudioFrequencyVoiceRecognitionActivity to 30Hz.

Bug: 199433943
Test: build, install, run....
Change-Id: If6a166c549c5ef722958f0aaa8b70e647984fdc9
Merged-In: If6a166c549c5ef722958f0aaa8b70e647984fdc9
(cherry picked from commit 3c3d682d6bb0b4cabe8f10721dd45dcb637a62ed)
1 file changed