Add a class for caching settings migration data

This avoids calling the method multiple times on first bootup.

Bug: 151888061
Test: atest com.android.server.wifi
Change-Id: I9c92861ebb026d8305aeb0e29b388e4b1037cfaa
8 files changed
tree: fa9e1b133ab60af7d0fdcf10f41451c037bf683b
  1. apex/
  2. service/
  3. PREUPLOAD.cfg