The sing action uses getUserMedia + MediaRecorder, which in a browser is
gated only by the standard web mic prompt. In Capacitor's Android
WebView it additionally requires the RECORD_AUDIO permission to be
declared in AndroidManifest.xml; without it the WebView rejects with
NotAllowedError and no system prompt is ever shown, so tapping record
silently fails on the Android app while working fine in the browser.
Also add MODIFY_AUDIO_SETTINGS, which some devices require for the
echoCancellation / noiseSuppression / autoGainControl constraints that
InlineSingCard passes to getUserMedia.
Separately, reorder AUDIO_MIME_CANDIDATES to prefer audio/mp4/aac over
audio/webm;codecs=opus. iOS WKWebView cannot decode WebM/Opus in an
<audio> element, so the recorded Blob's preview URL failed to load on
iOS. Android WebView and desktop Chromium both support mp4/aac, so
preferring it first is safe cross-platform. This mirrors the ordering
already used by useVoiceRecorder.ts.
Alex Gleason
d2cf678491