Merge "docs: [Revert] Improved description of "package" attribute (manifest)."...

<dd>A full Java-language-style package name for the Android application. The

  name should be unique.  The name may contain uppercase or lowercase letters

  ('A' through 'Z'), numbers, and underscores ('_').  However, individual

  package name parts may only start with letters. Note that you can use

  different names for the Android application package and for the Java package

  identifiers used in the application's classes; these two types of names are

  entirely independent.

  package name parts may only start with letters.

<p>To avoid conflicts with other developers, you should use Internet domain ownership as the

basis for your package names (in reverse). For example, applications published by Google start with