Only check activity rotation allowed when considering menu layout

- The canRecentsActivityRotate() also checks whether system rotation
  is enabled which prevents us from using the right layout orientation
  when home rotation is enabled while system rotation is disabled.

Bug: 168278832
Test: Tested menu visibility in combination of
      Auto rotate setting x Home rotation setting X Device orientation
Change-Id: If74a38b1ec51abd2ea7f3ba3de23f0b2c4cab0ab
Merged-In: If74a38b1ec51abd2ea7f3ba3de23f0b2c4cab0ab