Revert "Fix the bug that camera can't open again after disconnected"

This reverts commit 03e6dacb31332de191a1190a6b6f7d948f6536ef.

Change-Id: I469085d6993a6005f3487a3a33327bdaac498993
diff --git a/camera2/portability/src/com/android/ex/camera2/portability/AndroidCameraAgentImpl.java b/camera2/portability/src/com/android/ex/camera2/portability/AndroidCameraAgentImpl.java
index a911168..1064d29 100644
--- a/camera2/portability/src/com/android/ex/camera2/portability/AndroidCameraAgentImpl.java
+++ b/camera2/portability/src/com/android/ex/camera2/portability/AndroidCameraAgentImpl.java
@@ -349,16 +349,13 @@
         public void handleMessage(final Message msg) {
             super.handleMessage(msg);
 
-            int cameraAction = msg.what;
-            // We allow OPEN_CAMERA action to proceed even if the camera may be in an invalid state.
-            // Otherwise, previous failed camera actions with RuntimeException would cause the
-            // camera can't be opened ever again.
-            if (getCameraState().isInvalid() && cameraAction != CameraActions.OPEN_CAMERA) {
+            if (getCameraState().isInvalid()) {
                 Log.v(TAG, "Skip handleMessage - action = '" + CameraActions.stringify(msg.what) + "'");
                 return;
             }
             Log.v(TAG, "handleMessage - action = '" + CameraActions.stringify(msg.what) + "'");
 
+            int cameraAction = msg.what;
             try {
                 switch (cameraAction) {
                     case CameraActions.OPEN_CAMERA: {
@@ -382,7 +379,6 @@
 
                             mCamera.setErrorCallback(this);
 
-                            mCameraState.setValid();
                             mCameraState.setState(AndroidCameraStateHolder.CAMERA_IDLE);
                             if (openCallback != null) {
                                 CameraProxy cameraProxy = new AndroidCameraProxyImpl(
diff --git a/camera2/portability/src/com/android/ex/camera2/portability/CameraStateHolder.java b/camera2/portability/src/com/android/ex/camera2/portability/CameraStateHolder.java
index 65052e6..b758af2 100644
--- a/camera2/portability/src/com/android/ex/camera2/portability/CameraStateHolder.java
+++ b/camera2/portability/src/com/android/ex/camera2/portability/CameraStateHolder.java
@@ -59,20 +59,13 @@
     }
 
     /**
-     * Change the state to be invalid.
+     * Change the state to be invalid. Once invalidated, the state will be invalid forever.
      */
     public synchronized void invalidate() {
         mInvalid = true;
     }
 
     /**
-     * Change the state to be valid.
-     */
-    public synchronized void setValid() {
-        mInvalid = false;
-    }
-
-    /**
      * Whether the state is invalid.
      *
      * @return True if the state is invalid.