Allowing R and S developer GSI for DSU

Adding new keys to allow a device boot a R-Deverloper-GSI and
S-Developer-GSI, respectively.

Also removing previous keys for R-Compliance-GSI and
S-Compliance-GSI, respectively. We will be allowing CTS-on-GSI
to run on unlocked state in R and later releases.

  https://android-review.googlesource.com/c/platform/test/suite_harness/+/1228453

Bug: 149805495
Test: boot a device
Change-Id: I000365d0b407605b426c4695c6ac614150ee9b13
Merged-In: I6bc1e068368e64cb0bbf6ef63805444b35a1fdfb