Ensure that 'release-keys' are set on properties

Some properties had 'test-keys' still set
after signing the target files zip for release.

These properties are now added to the RewriteProps
method.

Bug: 131810966
Test: manual
Test: `atest releasetools_test`
Change-Id: Ifb352ed28f5100f1e9f686d77e935723f7f6d3ae