Release dynamic sensor data at the end of process

This makes sure that sensor service has full control of the life time of
the dynamic sensor data, and will not be affected by when the callback
is invoked.

Fixes: 329020894
Fixes: 337741176
Test: Connect a dynamic sensor to phone, rapidly turn on/off bluetooth to
emulate fast connection/disconnection of dynamic sensor. Not seeing
crash anymore

Change-Id: I6c9b4fa06e08dc1bb0b5e578ee2ec10b95fe84c3