Add a cancel string for ToggleSubscriptionDialog to handle Tamil
translation

Bug: 185553806
Test: Build
Change-Id: I90149c9e4459747d8cd1c35d00c29f81710eb6f4
Merged-In: I90149c9e4459747d8cd1c35d00c29f81710eb6f4
Merged-In: Id7f6042e0f7c70a3a8ca951fb80bb7f30acedcb9
2 files changed