Fix wrong handling in getQueryParameter()

ContactsProvider2#getQueryParameter() wrongly
interprets long parameter name as shorter one which is
substring of the original.
(e.g. "longer_param=value" is also treated as "param=value")

Bug: 4260119
Change-Id: Ide096589106984a5d99e70f754830d7943a7ac5c
2 files changed