Backport implementation of AltitudeConverter to T.

Relnote: N/A
Bug: 265013616
Test: atest FrameworksMockingServicesTests:AltitudeConverterTest
Change-Id: I5c1bbdec79d61ba7abad4db8131c5dca80ef7b9a
Merged-In: Idb699d03035c7ec56a07f3c648f49119b014363f
23 files changed