Null check intent before starting "learn more".

It is possible in certain build configurations to have an invalid
link. Instead of crashing, swallow the error and write to logs.

BUG: 28381984
Fixes: 31246856
Change-Id: I19f20b96afb42758187707f1b86a5817e8d737a8
(cherry picked from commit 6561d487)
(cherry picked from commit e56d2be0)
(cherry picked from commit 82a34268e6100ee1f3dde218be49d8b38d247b91)