project: bump dependencies

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/build.gradle

@@ -70,7 +70,7 @@ ext {
     annotationsVersion = '1.0.1'
     appcompatVersion = '1.0.2'
     cardviewVersion = '1.0.0'
-    databindingVersion = '3.1.3'
+    databindingVersion = '3.3.1'
     materialComponentsVersion = '1.0.0'
     jsr305Version = '3.0.2'
     preferenceVersion = '1.0.0'

app/src/main/res/xml/preferences.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+<androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
     <com.wireguard.android.preference.VersionPreference android:icon="@mipmap/ic_launcher" />
     <CheckBoxPreference
         android:defaultValue="false"
@@ -15,4 +15,4 @@
         android:summaryOff="@string/dark_theme_summary_off"
         android:summaryOn="@string/dark_theme_summary_on"
         android:title="@string/dark_theme_title" />
-</PreferenceScreen>
+</androidx.preference.PreferenceScreen>