Update imports for preferences

Change-Id: I3435a9214b12615f5198ac304943f1860d7eeb77
diff --git a/src/com/havoc/support/preferences/GlobalCheckBoxPreference.java b/src/com/havoc/support/preferences/GlobalCheckBoxPreference.java
index 53e9695..9b52530 100644
--- a/src/com/havoc/support/preferences/GlobalCheckBoxPreference.java
+++ b/src/com/havoc/support/preferences/GlobalCheckBoxPreference.java
@@ -17,7 +17,7 @@
 package com.havoc.support.preferences;
 
 import android.content.Context;
-import android.preference.CheckBoxPreference;
+import android.support.v7.preference.CheckBoxPreference;
 import android.provider.Settings;
 import android.util.AttributeSet;
 
diff --git a/src/com/havoc/support/preferences/SecureCheckBoxPreference.java b/src/com/havoc/support/preferences/SecureCheckBoxPreference.java
index 66e5afe..1f8800e 100644
--- a/src/com/havoc/support/preferences/SecureCheckBoxPreference.java
+++ b/src/com/havoc/support/preferences/SecureCheckBoxPreference.java
@@ -17,7 +17,7 @@
 package com.havoc.support.preferences;
 
 import android.content.Context;
-import android.preference.CheckBoxPreference;
+import android.support.v7.preference.CheckBoxPreference;
 import android.provider.Settings;
 import android.util.AttributeSet;
 
diff --git a/src/com/havoc/support/preferences/SystemCheckBoxPreference.java b/src/com/havoc/support/preferences/SystemCheckBoxPreference.java
index b361669..498587e 100644
--- a/src/com/havoc/support/preferences/SystemCheckBoxPreference.java
+++ b/src/com/havoc/support/preferences/SystemCheckBoxPreference.java
@@ -17,7 +17,7 @@
 package com.havoc.support.preferences;
 
 import android.content.Context;
-import android.preference.CheckBoxPreference;
+import android.support.v7.preference.CheckBoxPreference;
 import android.provider.Settings;
 import android.util.AttributeSet;