RxErrorHandler Versions Save

1. Modify MinSdkVersion to 9
2. Upgrade rxjava version to v2.1.10
3. Upgrade BuilToolsVersion to v3.0.1
4. Upgrade SDK version to 27

1.Support Backpressure,add Class ErrorHandleSubscriberOfFlowable and Class RetryWithDelayOfFlowable 2.Upgrade AndroidSDKVersion to 26

1. Improve ResponseErrorListener

1. Delete AndroidManifest application

supprot Rxjava2