Clean up default preferences setter

app/src/main/res/xml/defaultpref.xml

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    <Preference
-        android:key="theme"
-        android:defaultValue="Default"
-        />
-    <Preference
-        android:key="auto_blacklist"
-        android:defaultValue="com.google.android.apps.walletnfcrel"
-        />
-    <Preference
-        android:key="auto_whitelist"
-        android:defaultValue="com.keramidas.TitaniumBackupPro"
-        />
-</PreferenceScreen>

app/src/main/res/xml/uisettings.xml

@@ -8,6 +8,7 @@
             android:key="theme"
             android:title="Theme"
             android:summary="Select a theme"
+            android:defaultValue="Default"
             android:entries="@array/themes"
             android:entryValues="@array/themes"/>
     </PreferenceCategory>
@@ -16,6 +17,7 @@
 
         <CheckBoxPreference
             android:key="enable_quicktile"
+            android:defaultValue="false"
             android:title="@string/settings_enable_quicktile_title"
             android:summary="@string/settings_enable_quicktile_summary" />
 
@@ -24,6 +26,7 @@
         android:title="@string/settings_root_category">
         <CheckBoxPreference
             android:key="keep_root_off"
+            android:defaultValue="false"
             android:title="@string/settings_keep_root_off_title"
             android:summary="@string/settings_keep_root_off_summary" />
 
@@ -39,6 +42,7 @@
 
         <CheckBoxPreference
             android:key="developer_logging"
+            android:defaultValue="false"
             android:title="@string/settings_developer_logging_title"
             android:summary="@string/settings_developer_logging_summary" />