Merge "Use dlext_namespaces.h from the platform" into android12-dev am: 49cdebe55f

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/3923345

Change-Id: I7a15d6b26bfc96b423a98c2ee03f2b60765c50dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>