Replaced drawables with vectors (SVG) for TrackController.

- ic_button_pause
- ic_button_record
- ic_button_stop

drawable-svg/ic_button_stop_disabled.svg

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns:cc="http://creativecommons.org/ns#"
+    xmlns:dc="http://purl.org/dc/elements/1.1/"
+    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+    height="125"
+    version="1.1"
+    viewBox="0 0 125 125"
+    width="125"
+    xmlns="http://www.w3.org/2000/svg">
+    <circle
+        cx="62.5"
+        cy="62.5"
+        fill="#2a2a2a"
+        r="50" />
+    <ellipse
+        cx="62.502"
+        cy="63.03"
+        fill="none"
+        rx="59.986"
+        ry="59.984"
+        stroke="#2a2a2a"
+        stroke-width="5.0319"
+        transform="matrix(.99996 -.0084743 0 1 0 0)" />
+    <metadata>
+        <rdf:RDF>
+            <cc:Work rdf:about="">
+                <dc:format>image/svg+xml</dc:format>
+                <dc:title />
+                <dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+            </cc:Work>
+        </rdf:RDF>
+    </metadata>
+    <rect
+        fill="#555"
+        height="15"
+        width="15"
+        x="54"
+        y="56" />
+</svg>