Update USES_LASSEN_MODEM soong config settings for aosp projects.

Add the flag "use_lassen_modem" for bp to do the same checking like
"USES_LASSEN_MODEM" in mk.

Bug: 330654744
Test: 1. lunch aosp_cheetah-trunk_staging-userdebug
      2. m RilConfigService
Change-Id: Ic277823f330794f6ceff6d3ccc6a96bb75e82b94
1 file changed