repoinitsafecleaner: Use static project.list tree
repoinitsafecleaner: Use static project.list tree

 * Avoids using 'repo list' in an environment where the
    manifests / local_manifest is not certified to be usable
    (duplicated projects during reposwitcher for example)

 * Also improve function outputs and add a header

Change-Id: Icc6c38656bebbb2c4f4d8dcadcac1c5fa00d802f
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools