Fix keybase import

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpImportExport.java

@@ -139,6 +139,8 @@ public class PgpImportExport {
                 String expectedFp = entry.getExpectedFingerprint();
                 if(expectedFp != null) {
                     if(!PgpKeyHelper.convertFingerprintToHex(key.getFingerprint()).equals(expectedFp)) {
+                        Log.d(Constants.TAG, "fingerprint: " + PgpKeyHelper.convertFingerprintToHex(key.getFingerprint()));
+                        Log.d(Constants.TAG, "expected fingerprint: " + expectedFp);
                         Log.e(Constants.TAG, "Actual key fingerprint is not the same as expected!");
                         badKeys += 1;
                         continue;

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyHelper.java

@@ -104,7 +104,7 @@ public class PgpKeyHelper {
      * @return
      */
     public static String convertFingerprintToHex(byte[] fingerprint) {
-        String hexString = Hex.toHexString(fingerprint);
+        String hexString = Hex.toHexString(fingerprint).toLowerCase(Locale.US);
 
         return hexString;
     }