Camera2: Allow captures right after abort

Since implementation is still largely synchronous, this is safe.
For the future full-asynchronous implementation, this is the behavior
we want in any case.

Bug: 17345630
Change-Id: Ib54a3441b21fa8cb42bcc6548e5639d9db7ec193

core/java/android/hardware/camera2/impl/CameraCaptureSessionImpl.java

@@ -143,7 +143,6 @@ public class CameraCaptureSessionImpl extends CameraCaptureSession {
         }
 
         checkNotClosed();
-        checkLegalToCapture();
 
         handler = checkHandler(handler, callback);
 
@@ -166,7 +165,6 @@ public class CameraCaptureSessionImpl extends CameraCaptureSession {
         }
 
         checkNotClosed();
-        checkLegalToCapture();
 
         handler = checkHandler(handler, callback);
 
@@ -188,7 +186,6 @@ public class CameraCaptureSessionImpl extends CameraCaptureSession {
         }
 
         checkNotClosed();
-        checkLegalToCapture();
 
         handler = checkHandler(handler, callback);
 
@@ -211,7 +208,6 @@ public class CameraCaptureSessionImpl extends CameraCaptureSession {
         }
 
         checkNotClosed();
-        checkLegalToCapture();
 
         handler = checkHandler(handler, callback);
 
@@ -542,13 +538,6 @@ public class CameraCaptureSessionImpl extends CameraCaptureSession {
         }
     }
 
-    private void checkLegalToCapture() {
-        if (mAborting) {
-            throw new IllegalStateException(
-                    "Session is aborting captures; new captures are not permitted");
-        }
-    }
-
     private void checkNotClosed() {
         if (mClosed) {
             throw new IllegalStateException(