Fix vold vulnerability in FrameworkListener

Modify FrameworkListener to ignore commands that exceed the maximum
buffer length and send an error message.

Bug: 29831647
Change-Id: I9e57d1648d55af2ca0191bb47868e375ecc26950
Signed-off-by: Connor O'Brien <connoro@google.com>
(cherry picked from commit baa126dc158a40bc83c17c6d428c760e5b93fb1a)
(cherry picked from commit 470484d2a25ad432190a01d1c763b4b36db33c7e)

FrameworkListener::FrameworkListener(int sock) :
 SocketListener(sock, true) {
    init(NULL, false);
}

FrameworkListener::FrameworkListener(int sock) :
 SocketListener(sock, true) {
    init(NULL, false);
}
