[BR12] Use sdk level instead of aconfig flag

This flag is also needed inside the mainline module.
Currently, there is no safe way to use aconfig flag in the module.
Thus, revert this check and use sdk level instead.

Test: atest FrameworksServicesTests:NetworkManagementServiceTest
Bug: 297836825
Change-Id: Ieec0a15cbe6cf3c65f765b18c66b45e4ec93670d
2 files changed