Bump version

app/build.gradle

 def versionMajor = 2
 def versionMinor = 2
 def versionPatch = 6
-def versionBuild = 1 // bump for dogfood builds, public betas, etc.
+def versionBuild = 2 // bump for dogfood builds, public betas, etc.
 apply plugin: 'com.android.application'
 apply plugin: 'io.fabric'