Clear cache after system update.

CarrierConfigLoader should clear its cache after system update just in
case some behavior related to carrier config has changed. In particular,
the default config app may have different config after an update, and
it's not guaranteed that the package version will have changed. (We
definitely don't get package install events if the package changes
during an OTA.)

Bug: 21999181
Change-Id: I6881afcb7754a74b14ada43c29d2496dd32c84f9
1 file changed