Changes for import and generate key along with some code optimizations

Applet/Applet/JCardSimProvider/com/android/javacard/keymaster/KMCipherImpl.java

@@ -0,0 +1,42 @@
+package com.android.javacard.keymaster;
+
+import com.android.javacard.keymaster.KMCipher;
+import javacardx.crypto.Cipher;
+
+public class KMCipherImpl extends KMCipher{
+  Cipher cipher;
+  short cipherAlg;
+  short paddingAlg;
+  KMCipherImpl(Cipher c){
+    cipher = c;
+  }
+
+  @Override
+  public short doFinal(byte[] buffer, short startOff, short length, byte[] scratchPad, short i) {
+    return cipher.doFinal(buffer, startOff, length, scratchPad, i);
+  }
+
+  @Override
+  public short getCipherAlgorithm() {
+    return cipherAlg;
+  }
+
+  @Override
+  public void setCipherAlgorithm(short alg) {
+    cipherAlg = alg;
+  }
+  @Override
+  public short update(byte[] buffer, short startOff, short length, byte[] scratchPad, short i) {
+    return cipher.update(buffer,startOff,length,scratchPad,i);
+  }
+
+  @Override
+  public short getPaddingAlgorithm() {
+    return paddingAlg;
+  }
+
+  @Override
+  public void setPaddingAlgorithm(short alg) {
+    paddingAlg = alg;
+  }
+}

Applet/Applet/JCardSimProvider/com/android/javacard/keymaster/KMCryptoProviderImpl.java

@@ -0,0 +1,8 @@
+
+package com.android.javacard.keymaster;
+
+public class KMCryptoProviderImpl {
+  public static KMCryptoProvider instance(){
+    return new KMJcardSimulator();
+  }
+}