[android] Update test app icon

Fixes #2838

platform/default/resources/mapbox-icon-large.svg

@@ -0,0 +1,84 @@
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+   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"
+   width="180"
+   height="180.00002"
+   id="svg7945"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="mapbox-icon-large.svg"
+   inkscape:export-filename="/home/leith/mb/sirius-android/Sirius/src/main/res/mipmap-mdpi/mapbox_app_icon.png"
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+     showgrid="true"
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+     inkscape:window-height="1746"
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+     inkscape:window-y="54"
+     inkscape:window-maximized="1"
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+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0">
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+       visible="true"
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+  <metadata
+     id="metadata7950">
+    <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></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
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+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
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+     transform="translate(-240,-272.36215)">
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+</svg>