give key editing its own pass phrase mechanism, as the new cache won't work there

src/org/thialfihar/android/apg/Apg.java

@@ -158,6 +158,7 @@ public class Apg {
 
     private static HashMap<Long, CachedPassPhrase> mPassPhraseCache =
             new HashMap<Long, CachedPassPhrase>();
+    private static String mEditPassPhrase = null;
 
     public static class GeneralException extends Exception {
         static final long serialVersionUID = 0xf812773342L;
@@ -273,6 +274,14 @@ public class Apg {
         }
     }
 
+    public static void setEditPassPhrase(String passPhrase) {
+        mEditPassPhrase = passPhrase;
+    }
+
+    public static String getEditPassPhrase() {
+        return mEditPassPhrase;
+    }
+
     public static void setCachedPassPhrase(long keyId, String passPhrase) {
         mPassPhraseCache.put(keyId, new CachedPassPhrase(new Date().getTime(), passPhrase));
     }