[android_webview] Split out an apk folder from the glue folder.

[android_webview] Split out an apk folder from the glue folder.

The reason for this separation is to distinguish the glue layer code
(which is shared amongst all of the WebView .apks) from the apk-specific
bits (which are not shared at all).

BUG=440792
Committed: https://crrev.com/2bd10c6a723dba5ea1b5e308540a558147f42f82
Cr-Commit-Position: refs/heads/master@{#308074}

[mkosiba (inactive), 2014-12-11 18:24:38]

mkosiba@chromium.org changed reviewers:
+ torne@chromium.org

[Torne, 2014-12-11 18:56:51]

lgtm

[mkosiba (inactive), 2014-12-11 19:33:12]

The CQ bit was checked by mkosiba@chromium.org

[commit-bot: I haz the power, 2014-12-11 19:34:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/802453002/1

[mkosiba (inactive), 2014-12-11 19:41:05]

The CQ bit was unchecked by mkosiba@chromium.org

[mkosiba (inactive), 2014-12-12 10:27:17]

The CQ bit was checked by mkosiba@chromium.org

[commit-bot: I haz the power, 2014-12-12 10:27:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/802453002/1

[mkosiba (inactive), 2014-12-12 10:52:06]

The CQ bit was unchecked by mkosiba@chromium.org

[mkosiba (inactive), 2014-12-12 13:30:58]

The CQ bit was checked by mkosiba@chromium.org

[commit-bot: I haz the power, 2014-12-12 13:31:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/802453002/1

[commit-bot: I haz the power, 2014-12-12 14:39:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-12 14:40:21]

Patchset 1 (id:??) landed as
https://crrev.com/2bd10c6a723dba5ea1b5e308540a558147f42f82
Cr-Commit-Position: refs/heads/master@{#308074}