Since both the java implementation (OpenJDK) and Android\'s virtual machine DalvikVM are opensource it must be possible to implement Sun\'s JavaVM on top Google\'s
OpenJDK
try GNURoot app (proot ptrace container) with debian Wheezy; apt-get update apt-get install openjdk-7-jre /usr/lib/jvm/java-7-openjdk-armel/jre/bin/java ... (including long path)