fix header attributes

docs/modules/sdk/pages/android_cheat_sheet.adoc

@@ -1,11 +1,6 @@
 = android
-:author:
-:revnumber:
-:revdate: 2016/03/17 20:48
-:relfileprefix: ../../
-:imagesdir: ../..
-:experimental:
-ifdef::env-github,env-browser[:outfilesuffix: .adoc]
+:revnumber: 2.0
+:revdate: 2016/07/11