Allow FrameworksWifiApiTests to be installed on R & S devices

FrameworksWifiApiTests cannot run on R devices because it
compiles against the latest unstable SDK. To fix this,
set target_sdk_version to "30".

Bug: 173336987
Test: 1. Flash R build
      2. Install S Wifi module
      3. Run `atest FrameworksWifiTests`
      4. Verify test APK installs on the device
         (Note: not all tests are passing.)
Change-Id: I747d8a0afc17dedcde1959cf062eef6e6e8a521f