use SharedPreferences to save verify results

If an app declares too much hosts for App Link, Statementservice will crash since
it uses Data class of WorkManager to save verify result for all hosts while Data throws
IllegalStateException if it occupies more than 10240 bytes when serialized.
This fix uses SharedPreferences to save verify results instead of Data class of WorkManager.

Test:Disable GMS core and reboot device, then install Google Map; Statementservice does not crash
and framework receives host verify results from Statementservice

Signed-off-by: Bin Wang <bin.wang@oppo.corp-partner.google.com>
Change-Id: I6d1b19fd8ed3158a621a2fb0089d92430482fd61