FrameworksWifiApiTests: Remove from S-module-on-R-platform presubmit

FrameworksWifiApiTests is not backwards compatible
and isn't planned to become backwards compatible,
due to numerous usages of new S APIs. Thus, S
FrameworksWifiApiTests will fail to pass on R devices.

Stop testing FrameworksWifiApiTests with this
configuration. Instead, only test it on
S-module-on-S-platform.

Bug: 174786649
Test: presubmit
Change-Id: Icd7d2802e0c395eddb500c9d1e652ba173d5f9d7