Delete Android build system makefiles.

Delete Android build system makefiles.

We no longer support building WebView with the Android build system;
delete the makefiles and makefile generation scripts used for this.

BUG=440793
TBR=brettw@chromium.org

Committed: https://crrev.com/52a2974928e433fd15c08dbd500e708a8039c895
Cr-Commit-Position: refs/heads/master@{#322590}

[Torne, 2015-03-27 12:17:16]

torne@chromium.org changed reviewers:
+ brettw@chromium.org, sgurun@chromium.org

[Torne, 2015-03-27 12:17:17]

+brettw for top-level OWNERS change
+sgurun for the rest :)

[sgurun-gerrit only, 2015-03-27 16:04:50]

On 2015/03/27 12:17:17, Torne wrote:
> +brettw for top-level OWNERS change
> +sgurun for the rest :)

LGTM

[Torne, 2015-03-27 16:09:08]

TBRing brett as it's just removing a per-file owner for a deleted file.

[Torne, 2015-03-27 16:09:12]

The CQ bit was checked by torne@chromium.org

[commit-bot: I haz the power, 2015-03-27 16:09:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1033263002/1

[commit-bot: I haz the power, 2015-03-27 16:31:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-27 16:31:48]

Patchset 1 (id:??) landed as
https://crrev.com/52a2974928e433fd15c08dbd500e708a8039c895
Cr-Commit-Position: refs/heads/master@{#322590}