add flutter

OnTime_Merchant_live/lib/flexbox-layout/flexbox/proguard-rules.txt

@@ -0,0 +1,20 @@
+#
+# Copyright 2016 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# The FlexboxLayoutManager may be set from a layout xml, in that situation the RecyclerView
+# tries to instantiate the layout manager using reflection.
+# This is to prevent the layout manager from being obfuscated.
+-keepnames public class com.google.android.flexbox.FlexboxLayoutManager