Temporarily disable run-test 004-JniTest on javac-dx configurations.

The test is failing since the new annotation lookup change,
which no longer resolves annotations classes. Disable it
while we investigate.

Test: test.py (with `ANDROID_COMPILE_WITH_JACK=false`)
Bug: 63089991
Bug: 38454151
Change-Id: Icfbfef061601fd99602bc95e99683a8b7ebb0dbb