Add a missing night version of the search icon

Affects: https://ebce-lyrasis.atlassian.net/browse/PP-2706

Author: io7m

simplified-ui/src/main/res/drawable-night/magnifying_glass.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="512dp"
+    android:height="512dp"
+    android:viewportWidth="512"
+    android:viewportHeight="512">
+  <path
+      android:fillColor="#FFFFFFFF"
+      android:pathData="M368,208A160,160 0,1 0,48 208a160,160 0,1 0,320 0zM337.1,371.1C301.7,399.2 256.8,416 208,416C93.1,416 0,322.9 0,208S93.1,0 208,0S416,93.1 416,208c0,48.8 -16.8,93.7 -44.9,129.1L505,471c9.4,9.4 9.4,24.6 0,33.9s-24.6,9.4 -33.9,0L337.1,371.1z"/>
+</vector>