Bumped version to 2.19beta6

Author: mikehardy

AnkiDroid/build.gradle

@@ -85,8 +85,8 @@ android {
         //
         // This ensures the correct ordering between the various types of releases (dev < alpha < beta < release) which is
         // needed for upgrades to be offered correctly.
-        versionCode=21900205
-        versionName="2.19beta5"
+        versionCode=21900206
+        versionName="2.19beta6"
         minSdk libs.versions.minSdk.get().toInteger()
 
         // Stays until this is in a release: https://github.com/google/desugar_jdk_libs/commit/c01a5446ca13586b801dbba4d83c6821337b3cc2