adb: switch over to Android.bp.

Rearrange some files while we're doing this.

Bug: http://b/71721338
Test: manually ran adb on windows
Change-Id: Ie47bda82279e4b9521505ad0353bf9ef649fc7d7
diff --git a/diagnose_usb/Android.bp b/diagnose_usb/Android.bp
new file mode 100644
index 0000000..a7ecf37
--- /dev/null
+++ b/diagnose_usb/Android.bp
@@ -0,0 +1,13 @@
+cc_library_static {
+    name: "libdiagnose_usb",
+    cflags: ["-Wall", "-Wextra", "-Werror"],
+    host_supported: true,
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
+    srcs: ["diagnose_usb.cpp"],
+    export_include_dirs: ["include"],
+    static_libs: ["libbase"],
+}