Reset pendingCameraSwitch as false after failed to post switchCameraOnThread to camera thread.

webrtc/sdk/android/api/org/webrtc/VideoCapturerAndroid.java

Index: webrtc/sdk/android/api/org/webrtc/VideoCapturerAndroid.java
diff --git a/webrtc/sdk/android/api/org/webrtc/VideoCapturerAndroid.java b/webrtc/sdk/android/api/org/webrtc/VideoCapturerAndroid.java
index 45a5fcbda3817b4a3499ffe3bca474e30f6b3022..d002925215f5f40689e4b7ff0cb731c4a199e773 100644
--- a/webrtc/sdk/android/api/org/webrtc/VideoCapturerAndroid.java
+++ b/webrtc/sdk/android/api/org/webrtc/VideoCapturerAndroid.java
@@ -184,8 +184,13 @@ public class VideoCapturerAndroid
         }
       }
     });
-    if (!didPost && switchEventsHandler != null) {
-      switchEventsHandler.onCameraSwitchError("Camera is stopped.");
+    if (!didPost) {
+      synchronized (pendingCameraSwitchLock) {
+        pendingCameraSwitch = false;
+      }
+      if (switchEventsHandler != null) {
+        switchEventsHandler.onCameraSwitchError("Camera is stopped.");
+      }
     }
   }