Modify version checks for the TzDataBundleInstaller

Modify version checks for the TzDataBundleInstaller:
A new version will be installed from any valid bundle providing
it is not older than the one found in /system.

Bug: 31008728
Test: make / vogar testing
Change-Id: Iadcf8f8e3df03c54339443e95de0d34e30d28bd8
4 files changed