Fix poor seed for Android HW encoder picture ID randomization.

webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc

Index: webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc
diff --git a/webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc b/webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc
index 6425015efe0596902812503cd23011420fa2bc0a..09b68fac076d5cba59b6f2f0157f65cbf5e5635b 100644
--- a/webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc
+++ b/webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc
@@ -375,7 +375,7 @@ MediaCodecVideoEncoder::MediaCodecVideoEncoder(JNIEnv* jni,
     ALOGW << "MediaCodecVideoEncoder ctor failed.";
     ProcessHWError(true /* reset_if_fallback_unavailable */);
   }
-  srand(time(NULL));
+  srand(rtc::Time32());
 }
 
 int32_t MediaCodecVideoEncoder::InitEncode(