Merge pull request #3753 from nextcloud/bumpMasterTo19.1.0alpha1

bump version to 19.1.0 Alpha01

app/build.gradle

@@ -33,8 +33,8 @@ android {
 
         // mayor.minor.hotfix.increment (for increment: 01-50=Alpha / 51-89=RC / 90-99=stable)
         // xx   .xxx  .xx    .xx
-        versionCode 190000003
-        versionName "19.0.0 Alpha 03"
+        versionCode 190010001
+        versionName "19.1.0 Alpha 01"
 
         flavorDimensions "default"
         renderscriptTargetApi 19