Revert "Revert "libprocessgroup: Add support for SetUserProfiles""

This reverts commit aee11b0a.

This change was originally reverted because its only user was reverted
under b/243096961 at ag/19679188. We bring it back now with a fixed user.

Bug: 236708592
Bug: 148425913
Ignore-AOSP-First: Topic with AMS changes which is developed on git_master

Change-Id: I2a8ae0d9faabe7950b758a09870d128889be4d0a
Merged-In: I2a8ae0d9faabe7950b758a09870d128889be4d0a