Stubs required for javac to compile lambda code

In order for javac to compile code with (non-serializable) lambdas
the included classes are required. These are based on OpenJDK 8
source code which has then been stubbed. The stubs are only
required for build paths that use javac (e.g. javadoc) and
are not to be deployed to a device.

Bug: 26753820
Change-Id: I6a78110d10fa157b2e101ea2556de01b59339ef3
9 files changed