Android segfault when adding new media streams

[alexlapa]

Summary

Segfault on android in group call (SFU) scenario when other member is connecting to the call.

Relevant logs and/or screenshots

E/rtc     ( 4408): #
E/rtc     ( 4408): # Fatal error in: ../../../webrtc/src/sdk/android/src/jni/pc/peer_connection.cc, line 391
E/rtc     ( 4408): # last system error: 0
E/rtc     ( 4408): # Check failed: it != remote_streams_.end()
E/rtc     ( 4408): # unexpected stream: 0xb4000078aadffe20
F/libc    ( 4408): Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 6110 (signaling_threa), pid 4408