Add permitted_packages to framework-tethering.

(cherry picked from commit c8ad3724)

Test: m out/soong/.intermediates/frameworks/base/packages/Tethering/common/TetheringLib/framework-tethering/android_common/package-check.stamp
Bug: 151314205
Merged-In: I248c36b2cf2f5776978c4fd2322d3b73ade309ff
Change-Id: Iddeeb6648f1ed2a31eebf04eb465ea675fb610ae