[Cast, Android, Presentation API] Fix the logic for showing controller vs chooser dialog

[Cast, Android, Presentation API] Fix the logic for showing controller vs chooser dialog

Historically, logic relied on having just one route at all. Now that there might be many routes per connection,
if there's a known route with the same source id, we show the chooser dialog, otherwise the picker dialog.

BUG=570448
TEST=Manual+e2e tests

Review URL: https://codereview.chromium.org/1534553002

Cr-Commit-Position: refs/heads/master@{#365654}
(cherry picked from commit 9a35760ec3a0cb170fc4aa00d07d4968da4d1741)

Committed: https://chromium.googlesource.com/chromium/src/+/586e9b8b671dafed514aa937df658bd180a1481e

[whywhat, 2015-12-17 10:13:36]

Description was changed from

==========
[Cast, Android, Presentation API] Fix the logic for showing controller vs
chooser dialog

Historically, logic relied on having just one route at all. Now that there might
be many routes per connection,
if there's a known route with the same source id, we show the chooser dialog,
otherwise the picker dialog.

BUG=570448
TEST=Manual+e2e tests

Review URL: https://codereview.chromium.org/1534553002

Cr-Commit-Position: refs/heads/master@{#365654}
(cherry picked from commit 9a35760ec3a0cb170fc4aa00d07d4968da4d1741)
==========

to

==========
[Cast, Android, Presentation API] Fix the logic for showing controller vs
chooser dialog

Historically, logic relied on having just one route at all. Now that there might
be many routes per connection,
if there's a known route with the same source id, we show the chooser dialog,
otherwise the picker dialog.

BUG=570448
TEST=Manual+e2e tests

Review URL: https://codereview.chromium.org/1534553002

Cr-Commit-Position: refs/heads/master@{#365654}
(cherry picked from commit 9a35760ec3a0cb170fc4aa00d07d4968da4d1741)

Committed:
https://chromium.googlesource.com/chromium/src/+/586e9b8b671dafed514aa937df65...
==========

[whywhat, 2015-12-17 10:13:37]

Committed patchset #1 (id:1) manually as
586e9b8b671dafed514aa937df658bd180a1481e.