seprate device health check into global presubmit vs post-submit

sadly randomly crashing/ANRing processes is making global presubmit
flaky, hurting productivity overall

Bug: 35875532
Bug: 35314145
Bug: 35626956
Bug: 36066697
Test: run:
  adb shell am instrument -w -r \
    com.android.devicehealth.tests/android.support.test.runner.AndroidJUnitRunner
  adb shell am instrument -w -r -e annotation \
    android.platform.test.annotations.GlobalPresubmit \
    com.android.devicehealth.tests/android.support.test.runner.AndroidJUnitRunner
Change-Id: I12207d8c2465fabc6e43c8c3b782c00e9ea6df28