Merge pull request #3294 from nextcloud/bumpVersionTo17.2.0alpha

bump version to 17.2.0 Alpha01

app/build.gradle

@@ -46,8 +46,8 @@ android {
 
         // mayor.minor.hotfix.increment (for increment: 01-50=Alpha / 51-89=RC / 90-99=stable)
         // xx   .xxx  .xx    .xx
-        versionCode 170100020
-        versionName "17.10.0 Alpha 20"
+        versionCode 170200001
+        versionName "17.20.0 Alpha 01"
 
         flavorDimensions "default"
         renderscriptTargetApi 19