proguard-rules: fix proguard build issues

# This dnsjava class uses old Sun API

-dontnote org.xbill.DNS.spi.DNSJavaNameServiceDescriptor

-dontwarn org.xbill.DNS.spi.DNSJavaNameServiceDescriptor

-dontnote org.xbill.DNS.ResolverConfig

# See http://stackoverflow.com/questions/5701126, happens in dnsjava

-optimizations !code/allocation/variable

-dontwarn com.squareup.okhttp3.**

-dontwarn javax.annotation.Nullable

-dontwarn javax.annotation.ParametersAreNonnullByDefault

-dontnote okhttp3.internal.**

# Project specific rules

-dontnote foundation.e.mail.PRNGFixes

}

-keep public class org.openintents.openpgp.**

# Kotlin

-keep class kotlin.Metadata { *; }

-dontnote kotlin.internal.**

-dontnote kotlin.reflect.jvm.internal.**

-dontnote sun.misc.Unsafe

-dontwarn java.lang.management.**

-dontnote junit.framework.**

-dontnote junit.runner.**

-dontwarn android.test.**