Add dummy BUILDER object to java interfaces.

Add dummy BUILDER object to java interfaces.

BUILDER object are needed to correctly encode interfaces. Add a dummy
object until the real interfaces are pushed to allow using interfaces in
structs.

BUG=392693
TBR=darin@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=283258

[qsr, 2014-07-15 09:26:22]

The CQ bit was checked by qsr@chromium.org

[commit-bot: I haz the power, 2014-07-15 09:29:25]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/qsr@chromium.org/398453002/1

[commit-bot: I haz the power, 2014-07-15 19:26:17]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[commit-bot: I haz the power, 2014-07-15 19:59:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-15 19:59:26]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[darin (slow to review), 2014-07-15 22:05:48]

Committed patchset #1 manually as r283258 (presubmit successful).