Support for Android 2.2 (Froyo) and 2.3 (Gingerbread) when using standard instantiation strategy (ObjenesisStd).

Android 3.0 and above were already supported so this should make Objenesis work on all Android platforms since 2.2 up to at least 4.2.2.
Merge pull request #1 from qertoip/master

Support for Android 2.2 (Froyo) and 2.3 (Gingerbread) when using standard instantiation strategy (ObjenesisStd).