Remove defaultEnable arg from isNetworkStackFeatureEnabled

If the feature is default disabled, isNetworkStackFeatureEnabled should
be used.
If the feature is default enabled, isNetworkStackFeatureNotChickenedOut
should be used.

Test: TH
Bug: 279108992
Change-Id: I2738f0a3fc7180570b7b31450e5d9abc5e88c0aa
9 files changed