tinycap: Modify capture_sample()for pcm data to frames Test: Without "Captured 0 frames" when generate wav file. Bug: 73723585 Change-Id: I4d1e08a7ae7d5e43a5415d812506dd1a783ac4cf (cherry picked from commit 848d0931b554043f95c8a29ce05b027478d56a4a)