Telegram X 0.28.3.1785-legacy crashes when calling or receiving a voice call due to a NoClassDefFoundError for android.media.AudioAttributes$Builder in the WebRTC audio handling code that doesn't exist on Android 4.4.4 (API 19) which leads to a native crash in libtgcallsjni.so starting at line 12126 (the crash happens even when Peer-To-Peer calling is turned off) :

logcat.txt

W/System.err(18755): java.lang.NoClassDefFoundError: android.media.AudioAttributes$Builder
W/System.err(18755): at org.webrtc.audio.WebRtcAudioTrack.getAudioAttributes(SourceFile:1)
W/System.err(18755): at org.webrtc.audio.WebRtcAudioTrack.createAudioTrackBeforeOreo(SourceFile:13)
W/System.err(18755): at org.webrtc.audio.WebRtcAudioTrack.initPlayout(SourceFile:197)
W/System.err(18755): at dalvik.system.NativeStart.run(Native Method)
E/rtc (18755):
E/rtc (18755):
E/rtc (18755): #
E/rtc (18755): # Fatal error in: /home/vk/tgx/app/jni/third_party/webrtc/sdk/android/src/jni/jni_generator_helper.h, line 90
E/rtc (18755): # last system error: 22
E/rtc (18755): # Check failed: !env->ExceptionCheck()
E/rtc (18755): #
F/libc (18755): Fatal signal 6 (SIGABRT) at 0x00004943 (code=-6), thread 18964 (tgc-work)

The device is a Samsung Grand Neo VE (I9060I) running Android 4.4.4.