[p_l]

DISCLAIMER: It's been some time since I used to read release notes for every new api level

Well... IIRC there was never an official call recording API, and in fact on some phones it was physically impossible to snoop on the telephony audio.

Most recording apps used to either work only on some qualcomm single chip phones where baseband exposed audio path to application processor, or enabled microphone recording in hopes of catching the audio from speakers (and not all phones allowed simultaneous mic use like that).