Theme the HMS picker.

// FREEBIE

Closes #2353

res/values/attrs.xml

@@ -96,4 +96,6 @@
     <attr name="pref_ic_appearance" format="reference" />
     <attr name="pref_ic_storage" format="reference" />
     <attr name="pref_ic_advanced" format="reference" />
+
+    <attr name="app_protect_timeout_picker_color" format="reference"/>
 </resources>

res/values/themes.xml

@@ -103,6 +103,8 @@
         <item name="pref_ic_appearance">@drawable/ic_brightness_6_black</item>
         <item name="pref_ic_storage">@drawable/ic_delete_black</item>
         <item name="pref_ic_advanced">@drawable/ic_advanced_black</item>
+
+        <item name="app_protect_timeout_picker_color">@style/BetterPickersDialogFragment.Light</item>
     </style>
 
     <style name="TextSecure.DarkTheme" parent="@style/Theme.AppCompat">
@@ -200,6 +202,8 @@
         <item name="pref_ic_appearance">@drawable/ic_brightness_6_gray</item>
         <item name="pref_ic_storage">@drawable/ic_delete_gray</item>
         <item name="pref_ic_advanced">@drawable/ic_advanced_gray</item>
+
+        <item name="app_protect_timeout_picker_color">@style/BetterPickersDialogFragment</item>
     </style>
 
     <style name="TextSecure.Light.Dialog"

src/org/thoughtcrime/securesms/preferences/AppProtectionPreferenceFragment.java

@@ -4,6 +4,7 @@ import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.content.res.TypedArray;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.CheckBoxPreference;
@@ -91,10 +92,16 @@ public class AppProtectionPreferenceFragment extends PreferenceFragment {
 
     @Override
     public boolean onPreferenceClick(Preference preference) {
+      int[]      attributes = {R.attr.app_protect_timeout_picker_color};
+      TypedArray hmsStyle   = getActivity().obtainStyledAttributes(attributes);
+
       new HmsPickerBuilder().setFragmentManager(getFragmentManager())
-                            .setStyleResId(R.style.BetterPickersDialogFragment_Light)
+                            .setStyleResId(hmsStyle.getResourceId(0, R.style.BetterPickersDialogFragment_Light))
                             .addHmsPickerDialogHandler(this)
                             .show();
+
+      hmsStyle.recycle();
+
       return true;
     }