Return the freed bytes from deleteOdex API

This will help quantify the number of bytes we free for
telemetry purposes.

Test: installd_tests
Bug: 187458876
Change-Id: I29f7974977a58decf784bda443715f8b11fdf7c1
(cherry picked from commit 0f3bebad25baf74fec2348b270514f7bf63b78b7)
6 files changed