Switch two samples to "WearPlusShared" template

The "Shared" directory has been removed from the "Wear" template.
Apps (like these) that need to use the "Shared" dir must migrate
to the "WearPlusShared" template for the build system to properly
work.

Affected samples:
- SpeedTracker
- SynchronizedNotifications

Change-Id: I82747049b36ddad6aa6fb21467ffb3587924ee3a
(cherry picked from commit 35aefbce5bffbd93268780d90a18fd0ec9c415bb)
2 files changed