Fix Vts errors

- Add REQUEST_NOT_SUPPORT into General Errors
- Add a util function to check General Errors
- Add a util function to check OEM Errors
- Changes to RIL command api tests based on the QC provided pdf
  to see if the errors from vts-web can be fixed

Test: Manual
Bug: 35671595

(cherry picked from commit 01e7c6ee)
Merged-In: I9500c686a75539dab37f0272349bc2f965cc0a8f
Change-Id: I9500c686a75539dab37f0272349bc2f965cc0a8f