[Concurrency] Fix Android C libdispatch build (#35881)
* [Concurrency] Fix Android C libdispatch build
We need to pass CMAKE_ANDROID_NDK and CMAKE_ANDROID_ARCH_ABI to the
build.
* Set proper ANDROID_ARCH_ABI
* Add -DCMAKE_ANDROID_API to C libdispatch build
* Fix compiler config for Android
