Remove config_show_regulatory_info tests

Runtime Resource Overlays (RROs) can no longer change the value of
resources in manifest when read during PackagerParser.

Remove usage of config_show_regulatory_info and rely on OEMs
configuring the component using <component-override>.

Bug: 135048762
Test: adb shell pm resolve-activity
com.android.settings/com.android.settings.RegulatoryInfoDisplayActivity
Change-Id: If48f40eb261a9c90e183d4ef9bcafb0fbda38f22