Merge "Backport implementation of AltitudeConverter to T." am: 7ac0b50c9a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2420963

Change-Id: I16ae659420197dc95897cd5bdfa330375cb08273
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>