drm_hwcomposer: CI: Use aospext to provide headers for clang-tidy

Since we're now using aospless archive for meson.build, we can use
headers from there and remove .ci/android_headers/ directory completely.

Adding aospless cflags also raised some new tidy checks fails,
which were fixed by this commit.

Since clang-tidy now relies on aospless files, running CI on the host
can't be supported and removed. Running CI within the docker container
is the only option left.

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
diff --git a/drm/DrmAtomicStateManager.h b/drm/DrmAtomicStateManager.h
index e5a0945..923927d 100644
--- a/drm/DrmAtomicStateManager.h
+++ b/drm/DrmAtomicStateManager.h
@@ -44,7 +44,7 @@
   SharedFd out_fence;
 
   /* helpers */
-  auto HasInputs() -> bool {
+  auto HasInputs() const -> bool {
     return display_mode || active || composition;
   }
 };