Create integration test for fastboot CLI

We rely on parsing the `fastboot devices` output in device labs, and a
format change previously broke us. This test will ensure that the output
is exactly what we expect.

Test: atest --host fastboot_integration_test

Change-Id: I7606e7b3e4a1edfe487ff14bb06cbd3c0a3aa777
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index 56cac88..f85d1de 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -446,3 +446,14 @@
     host_supported: true,
     export_include_dirs: ["."],
 }
+
+python_test_host {
+    name: "fastboot_integration_test",
+    main: "test_fastboot.py",
+    srcs: ["test_fastboot.py"],
+    data: [":fastboot"],
+    test_config: "fastboot_integration_test.xml",
+    test_options: {
+        unit_test: false,
+    },
+}