Delete unused testing scripts and WithFramework.

These scripts haven't worked in a long time now. run_core_test
uses VM options that aren't supported and WithFramework (which is
unmaintained) and run_junit.sh refers to an APK that doesn't
exist anymore.

If anyone wishes to run these tests individually, they can just
use vogar instead :
$ make vogar vogar.jar
$ vogar --mode=activity frameworks/base/tests/CoreTests/android/core/Sha1Test.java

This also allows us to delete the WithFramework class, which was
only referenced by these obsolete scripts.

bug: 22078684
Change-Id: I481f6721d51d50456421a1526c370b93aec9b351