full_base: Don't compile OpenWnn.
           This package is/was meant to be optional.

Change-Id: I41f9b7c6dab50fbaf7ba4e90c22f731e7e8cbce2
Merge "full_base: Don't compile OpenWnn.            This package is/was meant to be optional." into android-4.4
Merge branch 'android-4.4' of https://github.com/omnirom/android_build into android-4.4