Improvements to resume-on-reboot CTS test stability

 - Remove unnecessary reboots and redundant package removal statements.
 - Disable usb-installed app verification during tests to prevent instrumentation app installation from being blocked.
 - Switch to primary / main user before the test and remove default PIN if still present to conform test-start state.
 - Re-enable resumeOnReboot_TwoUsers_BothUserUnlock_Success since it is stable now.

Bug: 279052056,
Test: atest -c CtsAppSecurityHostTestCases:ResumeOnRebootHostTest
(cherry picked from https://android-review.googlesource.com/q/commit:fa0faa4b35bf4ac9560ad3f1b5cd2dda9bc5898a)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:f67d61188af2603bafef6b4dd432ecd0c41fe82c)
Merged-In: I151bae61b9149a60bd3ec6f68bf9febf5d0e3cfe
Change-Id: I151bae61b9149a60bd3ec6f68bf9febf5d0e3cfe
1 file changed