feat(examples): add Bluedroid and NimBLE BLE AMS client examples

Add Apple Media Service client demos that discover AMS on iOS, subscribe
to media entity updates, and expose remote playback control helpers.

examples/bluetooth/nimble/ble_ams/CMakeLists.txt

@@ -0,0 +1,8 @@
+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.22)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
+project(ble_ams)