[android_webview] Android.mk file cleanup.

[android_webview] Android.mk file cleanup.

We don't use the android_webview_java target anymore, get rid of it
and the resource_map entries.
Also, get rid of the res_hack folder since we now have a real resources
folder in our source tree.

BUG=None
TEST=compile on android_aosp bot
TBR=miguelg@chromium.org

Committed: https://crrev.com/866abeb12e42c99b18479d4ed9fa712df39c667b
Cr-Commit-Position: refs/heads/master@{#296695}

[mkosiba (inactive), 2014-09-25 11:12:51]

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

[benm (inactive), 2014-09-25 11:15:08]

lgtm

[mkosiba (inactive), 2014-09-25 11:31:09]

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

[mkosiba (inactive), 2014-09-25 11:31:10]

+Miguel for ui/android stamp

[mkosiba (inactive), 2014-09-25 11:37:47]

The CQ bit was checked by mkosiba@chromium.org

[commit-bot: I haz the power, 2014-09-25 11:38:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/540993002/40001

[commit-bot: I haz the power, 2014-09-25 12:13:30]

Committed patchset #3 (id:40001) as f3dfc410f5c027d7ede8f93b91e39377622b004a

[commit-bot: I haz the power, 2014-09-25 12:14:04]

Patchset 3 (id:??) landed as
https://crrev.com/866abeb12e42c99b18479d4ed9fa712df39c667b
Cr-Commit-Position: refs/heads/master@{#296695}