Decoding lead crash if android sdk build with android.tools.build:gradle 3.5.1

[zhangyihui1]

conference mode: subscribe forwardStream lead crash ,but publish success

p2p mode: other client publish localStream to android ,android side lead crash

log: 2019-10-25 13:29:09.932 3530-3565/owt.sample.conference W/System.err: java.lang.AbstractMethodError: abstract method "void org.webrtc.PeerConnection$Observer.onTrack(org.webrtc.RtpTransceiver)" 2019-10-25 13:29:09.932 3530-3565/owt.sample.conference E/rtc: # # Fatal error in: gen/sdk/android/generated_base_jni/jni/../../../../../../../third_party/webrtc/sdk/android/src/jni/jni_generator_helper.h, line 38 # last system error: 0 # Check failed: !env->ExceptionCheck() # 2019-10-25 13:29:09.932 3530-3565/owt.sample.conference A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 3565 (signaling_threa), pid 3530 (mple.conference)

build with gradle 3.4.1 can not find this issues

[al3chen]

same issue on gradle 3.5.2