Clarifies Javadocs for setDeviceMobilityState() API

Clarifies the meaning of high and low movement mobility
states, and that the setDeviceMobilityState() should be
called when transitioning between states.

Bug: 122614678
Test: compiles
Change-Id: Ife9920b81c985238931357ed978983a83d70ffef
1 file changed
tree: 9d8a7f55c62af7937a328bc78e49272085d70ec2
  1. framework/
  2. OsuLogin/
  3. OWNERS