Update versions to 1.5.2

vector-app/build.gradle

@@ -36,7 +36,7 @@ ext.versionMinor = 5
 // Note: even values are reserved for regular release, odd values for hotfix release.
 // When creating a hotfix, you should decrease the value, since the current value
 // is the value for the next regular release.
-ext.versionPatch = 0
+ext.versionPatch = 2
 
 static def getGitTimestamp() {
     def cmd = 'git show -s --format=%ct'