Remove some lint warnings

* Replace '...' with '…' where necessary
* Up maxSdk in Testprojects
* Ignore one more category of lint issues in ABS
* Remove debuggable flag from Manifests
* Reorder tags in Manifests according to lint
* Give some strings a more appropriate name
* Delete unused strings
* Set strings in strings-global.xml to translatable=false

[Successful testrun](http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/227/) (before merge with master)