Introduce framework-minus-apex and create jobscheduler-framework.jar

Bug: 137763703
Test: Clean local build + "flash -w" and boot
Test: Presubmit
Test: atest CtsJobSchedulerTestCases
Test: ./cts/tests/signature/runSignatureTests.sh
Change-Id: Ie2a5a7a17f903ac18de0bcdde5be25311a62fa01
22 files changed