Fix a double issue regarding interrupted builds due to pre-existing errors.

First, the ApkBuilder didn't cancel its run if the project had markers from JDT.
Second, the try/catch on ApkBuilder#build didn't properly test the
CoreException status severity (used getCode instead of getSeverity), so it did
not detect cancels being thrown by #abortOnBadSetup and displayed the error
in the console instead.
2 files changed