replace light blue search icon with grey one

drawable_resources/ic_search_light_grey.svg

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   width="24"
+   height="24"
+   viewBox="0 0 24 24"
+   id="svg4"
+   sodipodi:docname="ic_search_light_grey.svg"
+   inkscape:export-filename="C:\DEV\src\Android\Nextcloud\filtering-improvements\res\drawable-xxxhdpi\ic_search_light_blue.png"
+   inkscape:export-xdpi="1152"
+   inkscape:export-ydpi="1152"
+   inkscape:version="0.92.0 r15299">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1005"
+     id="namedview6"
+     showgrid="false"
+     inkscape:zoom="9.8333333"
+     inkscape:cx="-15.305085"
+     inkscape:cy="12"
+     inkscape:window-x="-9"
+     inkscape:window-y="-9"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg4" />
+  <path
+     d="M9.5,3A6.5,6.5 0 0,1 16,9.5C16,11.11 15.41,12.59 14.44,13.73L14.71,14H15.5L20.5,19L19,20.5L14,15.5V14.71L13.73,14.44C12.59,15.41 11.11,16 9.5,16A6.5,6.5 0 0,1 3,9.5A6.5,6.5 0 0,1 9.5,3M9.5,5C7,5 5,7 5,9.5C5,12 7,14 9.5,14C12,14 14,12 14,9.5C14,7 12,5 9.5,5Z"
+     id="path2"
+     style="fill:#000000;fill-opacity:1;opacity:0.5" />
+</svg>

src/com/owncloud/android/ui/fragment/ExtendedListFragment.java

@@ -532,7 +532,7 @@ public class ExtendedListFragment extends Fragment
             );
         } else {
             setMessageForEmptyList(R.string.file_list_empty_headline_search,
-                    R.string.file_list_empty_search, R.drawable.ic_search_light_blue);
+                    R.string.file_list_empty_search, R.drawable.ic_search_light_grey);
         }
     }