Convert Android WebView to store locale .pak files as res/raw resources

Motivation for this is to have webview be consistent with chrome in how
it bundles these. It does also have the side-effect of improving the
look-up time for LocaleDataPakExists.

BUG=371610

Review URL: https://codereview.chromium.org/1193613002

Cr-Commit-Position: refs/heads/master@{#336237}
14 files changed