Bump build tools version to account for sdk updates

Change-Id: Ibb15ac269ddfc61153d204079b070f7a5efbcbad
Reviewed-on: https://gerrit.libreoffice.org/21550Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>

android/source/build.gradle

@@ -30,7 +30,7 @@ dependencies {
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    buildToolsVersion "23.0.2"
     compileOptions {
         // silence some java-language features hints
         sourceCompatibility 6