CONTROL_AE_MODE_ON_EXTERNAL_FLASHを追加。

Author: TakayukiHoshi1984

dConnectDevicePlugin/dConnectDeviceHost/app/src/main/java/org/deviceconnect/android/deviceplugin/host/camera/CameraWrapper.java

@@ -688,7 +688,8 @@ private void onCaptureResult(final CaptureResult result, final boolean isComplet
                         Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                         mIsAeReady = aeState == null
                                 || aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED
-                                || aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED;
+                                || aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED
+                                || aeState == CaptureRequest.CONTROL_AE_STATE_PRECAPTURE;
                     }
                     mIsCaptureReady |= isCompleted;
                     if (DEBUG) {