Allow zygotes and installd to read odsign properties

(cherry picked from commit f135ce393c5ec272e0fd8d8746ecd42d261d308b)
Bug: 192049377
Test: manual
Ignore-AOSP-First: cherry pick of https://r.android.com/1753264
Change-Id: I3e8ee380fe38e1bd6cc90a568b10b97f877e68fa
8 files changed