Prevent activity leak which was introduced in Ifb86c931

Don't store the passed context directly, but use the app context.

Bug 5355671

Change-Id: I7cd4f4d1ee4d9364ae34407718125f65cdf67129
diff --git a/src/com/android/contacts/editor/ContactEditorUtils.java b/src/com/android/contacts/editor/ContactEditorUtils.java
index 900e68a..0e27223 100644
--- a/src/com/android/contacts/editor/ContactEditorUtils.java
+++ b/src/com/android/contacts/editor/ContactEditorUtils.java
@@ -65,7 +65,7 @@
 
     @VisibleForTesting
     ContactEditorUtils(Context context, AccountTypeManager accountTypes) {
-        mContext = context;
+        mContext = context.getApplicationContext();
         mPrefs = PreferenceManager.getDefaultSharedPreferences(mContext);
         mAccountTypes = accountTypes;
     }