[Settings] code refactor - rename isSubscriptionCanBeDisplayed

canSubscriptionBeDisplayed is more readable.

Reasonale:
When cherry-picking ag/12886476 into Android R branch (ag/13209427), a comment from code reviewer suggested this change.
Since ag/12886476 has been merged for a while, another patch for it is perferred option when comparing with reverting that CL and resubmit it.

Bug: 175830728
Change-Id: Ie91eb82504fd7cff6671803a2bc2560139690952
Test: build pass
Merged-In: Ie91eb82504fd7cff6671803a2bc2560139690952