Rename SupplementalProcess to SdkSandbox

Ignore-AOSP-First: code is not in AOSP yet
Bug: 220320098
Test: presubmit
Change-Id: Ida831e19203181f9e59eb447f4d03fac683e1019
Merged-In: Ida831e19203181f9e59eb447f4d03fac683e1019
(cherry picked from commit 4ee18ae8d0c7eb38faad41167417137831036453)
6 files changed