RENAMED Plugin and Sample to "android-maven-plugin" and "android-maven-sample"

[Charlie Collins]

This is confusing as hell, but I renamed the plugin and sample. Short
version - use "android-maven" for everthing now, nothing here is
"maven-android."

The PROJECT is Android-Maven, intentionally to differentiate it, but I
named the plugin "maven-android-plugin," originally, because I thought
that was the Maven convention for plugin names. Turns out its either
$name-maven-plugin or maven-$name-plugin. Since both of those are
valid per the Maven docs, and since the project is Android-Maven,
wanted to change it around as early as possible to avoid confusion.

All your "android-maven" are belong to us. (None of your "maven-
android" are belong here.)

I did rename in SVN, so updates should work if you had it checked out,
but a fresh co might be in order if you have any trouble.