libminradio: fix other cases of calls before rilConnected

- ResponseTrackerResult doesn't drop RadioError
- RESPOND_ERROR_IF_NOT_CONNECTED accepts varargs
- added getCellInfoList rilConnected guard

Bug: 405108602
Test: VtsHalRadioTargetTest
Flag: EXEMPT vendor HAL changes only
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:7495932c5ca997e8191d33f2f2c5c4127eb6b5e7)
Merged-In: I86af8af17011cdf18279c6e3a7d37a928920acc0
Change-Id: I86af8af17011cdf18279c6e3a7d37a928920acc0