Drop some packages from spongycastle to accomodate GB dexopt

Fixes #5269
// FREEBIE

proguard-spongycastle.pro

@@ -1,7 +1,6 @@
 -keep class org.spongycastle.crypto.* {*;}
 -keep class org.spongycastle.crypto.agreement.** {*;}
 -keep class org.spongycastle.crypto.digests.* {*;}
--keep class org.spongycastle.crypto.ec.* {*;}
 -keep class org.spongycastle.crypto.encodings.* {*;}
 -keep class org.spongycastle.crypto.engines.* {*;}
 -keep class org.spongycastle.crypto.macs.* {*;}
@@ -11,7 +10,6 @@
 -keep class org.spongycastle.crypto.prng.* {*;}
 -keep class org.spongycastle.crypto.signers.* {*;}
 
--keep class org.spongycastle.jcajce.provider.asymmetric.** {*;}
 -keep class org.spongycastle.jcajce.provider.digest.** {*;}
 -keep class org.spongycastle.jcajce.provider.keystore.** {*;}
 -keep class org.spongycastle.jcajce.provider.symmetric.** {*;}