Make ExternalNavigationHandler#intentsHaveSameResolvers() faster

ExternalNavigationHandler#intentsHaveSameResolvers() will be called on each
WebAPK navigation. Removing the duplicate call to
PackageManager#queryIntentActivities() saves 2ms per navigation.

BUG=609122
TEST=None

Review-Url: https://codereview.chromium.org/2035203002
Cr-Commit-Position: refs/heads/master@{#398194}
1 file changed