[B&R]Fix temperature unit not restored

1.Add measurement unit into B&R
2.Return filtered list due to u extension

Flag: EXEMPT bugfix
Bug: 403231848
Bug: 407886693
Test: atest SettingsHelperTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:bc3fc6158fffac4eba53f33f40c80fef39594eab)
Merged-In: I5070bc023090076c2a173327b855be212889a753
Change-Id: I5070bc023090076c2a173327b855be212889a753