Change group id of sdk data directories

Currently, we are setting owner id and group id of the directories the
same sandbox-uid. Since sandbox-uid overlaps with cache-gid, this causes
problem during size calculation.

The group id for sdk data directory doesn't matte, since we assign 700
permission to them anyways. So changing them to AID_NOBODY to reflect,
nobody has group access to these directories. This should resolve
problems with size calculation too.

Bug: 215506889
Test: atest installd_service_test
Ignore-AOSP-First: Some of the cls are missing in AOSP. Will cherry-pick
this with rest of them together next week.

Change-Id: Id672414b269f730a0181eafe67b8dbea0667c8e6
Merged-In: Id672414b269f730a0181eafe67b8dbea0667c8e6
(cherry picked from commit a73327aa)