Switch to use commandline parser

The commandline parser adds some flexibility to the argument parsing. It
also makes the help message more descriptive.

Bug: 74397117
Test: generate a image, checks the help message
Change-Id: Ib238658a9a6fa8806f1b0dde419c8fb970e7cb37
diff --git a/tools/image_generator/Android.bp b/tools/image_generator/Android.bp
index 3f718fe..ce6e277 100644
--- a/tools/image_generator/Android.bp
+++ b/tools/image_generator/Android.bp
@@ -17,7 +17,11 @@
 
     manifest: "ImageGenerator.mf",
 
+    static_libs: [
+        "commons-cli-1.2",
+    ],
+
     srcs: [
         "ImageGenerator.java",
     ],
-}
\ No newline at end of file
+}