There is a bug where the android.support.widget.SearchView gets
removed by proguard which causes breakage. This prevents that
from occuring by a bit of a brute force approach. While it would
be possible to keep only the class in question, this may leave
us open to other bugs in the future. Better to be safe than sorry.
http://stackoverflow.com/questions/22136032/action-bar-search-view-android-null-error
Proguard removed the method org.fdroid.fdroid.installer.SystemInstaller$PackageInstallObserver$packageInstalled,
resulting in an AbstractMethodError crash.
Fixes issue [79](https://gitlab.com/fdroid/fdroidclient/issues/79).
This increases the size of the .apk by ~800kb, which is clearly
undesirable. However, the nature of the Java security suite
implementations are that they use a lot of reflection to instantiate
classes. The end result is that proguard excludes classes which
may be required, depending on the security algorithms required
by certain certificates.
Fixes issue #88
