added licenses, cleaned up code, fixed warnings

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/ExportKeyringParcel.java

@@ -61,6 +61,7 @@ public class ExportKeyringParcel implements Parcelable {
         mOutputFile = outputFile;
     }
 
+    @SuppressWarnings("unused") // TODO: is it used?
     public ExportKeyringParcel(long[] masterKeyIds, boolean exportSecret, Uri outputUri) {
         mExportType = ExportType.EXPORT_URI;
         mMasterKeyIds = masterKeyIds;

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/RevokeKeyringParcel.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2013-2015 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2015 Vincent Breitmoser <v.breitmoser@mugenguild.com>
+ * Copyright (C) 2015 Adithya Abraham Philip <adithyaphilip@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package org.sufficientlysecure.keychain.service;
 
 import android.os.Parcel;

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/SaveKeyringParcel.java

@@ -242,6 +242,7 @@ public class SaveKeyringParcel implements Parcelable {
         }
     }
 
+    @SuppressWarnings("unchecked") // we verify the reads against writes in writeToParcel
     public SaveKeyringParcel(Parcel source) {
         mMasterKeyId = source.readInt() != 0 ? source.readLong() : null;
         mFingerprint = source.createByteArray();

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/input/CryptoInputParcel.java

@@ -20,7 +20,6 @@ package org.sufficientlysecure.keychain.service.input;
 import android.os.Parcel;
 import android.os.Parcelable;
 
-import org.sufficientlysecure.keychain.operations.results.OperationResult;
 import org.sufficientlysecure.keychain.util.ParcelableProxy;
 import org.sufficientlysecure.keychain.util.Passphrase;
 

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/input/RequiredInputParcel.java

@@ -3,7 +3,6 @@ package org.sufficientlysecure.keychain.service.input;
 import android.os.Parcel;
 import android.os.Parcelable;
 
-import org.spongycastle.util.Arrays;
 import org.sufficientlysecure.keychain.util.Passphrase;
 
 import java.nio.ByteBuffer;