Use verified Android encoder levels and expose negotiated frame rate

tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoEngine.kt

@@ -283,7 +283,9 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
             val selected = CallVideoNative.choose(caps, peer, desired.array()) ?: continue
             var candidate: CallVideoCodec? = null
             try {
-                candidate = CallVideoCodec(CallVideoFormat.from(selected), bitrate, implementation.name)
+                val verified = CallVideoFormat.from(selected).let { it.copy(level = maxOf(it.level, implementation.level)) }
+                check(CallVideoNative.supported(caps, peer, verified.array())) { "Verified encoder level exceeds peer capabilities" }
+                candidate = CallVideoCodec(verified, bitrate, implementation.name)
                 candidate.prepare()
                 check(CallVideoNative.supported(caps, peer, candidate.format.array())) { "Actual encoder format exceeds peer capabilities" }
                 return candidate