Merge "Set bottom frequency in AudioFrequencyVoiceRecognitionActivity to 30Hz." into stage-aosp-sc-ts-dev am: d2bf67dc26 am: d69d2838f7 am: f4d5bf06b3

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15905816

Change-Id: I58d3ceeaee75a8e8ba4d4c1dc59e7038f2f14a55