Move sthal_cli under 2.4

This version is specifically a mock of STHAL 2.4, so it makes more
sense to put it under 2.4 and name it as such.

I intend to add a separate mock for the AIDL version, so making sure
the two don't collide.

Test: Ran the mock HAL and manually verified operation.
Change-Id: Ica8e53b981d73737bfb1720628592e650fc86ee0
diff --git a/soundtrigger/2.4/cli/Android.bp b/soundtrigger/2.4/cli/Android.bp
new file mode 100644
index 0000000..7647967
--- /dev/null
+++ b/soundtrigger/2.4/cli/Android.bp
@@ -0,0 +1,8 @@
+java_binary {
+    name: "sthal_cli_2.4",
+    wrapper: "sthal_cli_2.4",
+    srcs: ["java/**/*.java"],
+    static_libs: [
+        "android.hardware.soundtrigger-V2.4-java",
+    ],
+}