build: Update 'svgo' to latest v3.2.0 and re-minify SVGs

The latest update of 'svgo' dependency includes three optimizations on
converting path commands, which
- improves closing paths and how we determine if to use absolute or
  relative commands.
- round arc or convert to lines based on the geometric sagitta
- convert cubic Bézier curves to quadratic Bézier curves where possible
Also unifiying npm command to qua standard notation `minify:svg`.

Bug: T354875
Change-Id: I0c712a4cec011ddda3a55caf4ecf493e1e00f3c8

resources/images/back-grey-rtl.svg

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
-	<path fill="#54595d" d="M7 4c-.8.8-.8 2.2 0 3l6 6-6 6c-.8.8-.8 2.2 0 3l9-9-9-9z"/>
+	<path fill="#54595d" d="M7 4c-.8.8-.8 2.2 0 3l6 6-6 6c-.8.8-.8 2.2 0 3l9-9z"/>
 </svg>