IntentResolver frequently iterates over hundreds of different IntentFilters
and spends much of its time creating iterators and comparing strings.
This change avoids reduces the amount of garbage created by eschewing
iterators where possible. The FastImmutableArraySet type on its own
provides a 2.5x speed boost compared to repeatedly iterating over a HashSet.
In absolute terms, during orientation changes we spent about 160ms resolving
11 intents and performing 1129 calls to IntentFilter.match. Now we spend
half of that time.
Change-Id: Ia120e0082c8cf0b572a0317b9ef4a22c766dbad6
2c376fc46c