Merge "The JE about "android.process.media" will pop up when you eject the SD card after you set SD as internel phone storage"

media/java/android/media/MediaScanner.java

@@ -1634,7 +1634,7 @@ public class MediaScanner implements AutoCloseable {
             selectionArgs = new String[] { path };
             c = mMediaProvider.query(mFilesUriNoNotify, FILES_PRESCAN_PROJECTION,
                     where, selectionArgs, null, null);
-            if (c.moveToFirst()) {
+            if (c != null && c.moveToFirst()) {
                 long rowId = c.getLong(FILES_PRESCAN_ID_COLUMN_INDEX);
                 int format = c.getInt(FILES_PRESCAN_FORMAT_COLUMN_INDEX);
                 long lastModified = c.getLong(FILES_PRESCAN_DATE_MODIFIED_COLUMN_INDEX);