sensorservice: Set the rate for pre-1.1 HALs _after_ activation

We want to be sure these are applied in the same sequence they
used to be...

Change-Id: Ied2ba08ed3c4bed3a80bac6ab5471fcea9ba2c09
(cherry picked from commit 21634df92129decfa5c9afa6a9e7adbfeb428a8d)