drm_hwcomposer: CI: Increase coverage

Add the following files to the build:
backend/BackendClient.cpp
backend/Backend.cpp
backend/BackendManager.cpp
backend/BackendRCarDu.cpp
bufferinfo/legacy/BufferInfoImagination.cpp
bufferinfo/legacy/BufferInfoLibdrm.cpp
bufferinfo/legacy/BufferInfoMaliHisi.cpp
bufferinfo/legacy/BufferInfoMaliMediatek.cpp
bufferinfo/legacy/BufferInfoMaliMeson.cpp
bufferinfo/legacy/BufferInfoMinigbm.cpp
compositor/DrmDisplayComposition.cpp
compositor/DrmDisplayCompositor.cpp
compositor/Planner.cpp
drm/DrmGenericImporter.cpp
DrmHwcTwo.cpp
drm/ResourceManager.cpp
drm/VSyncWorker.cpp
tests/worker_test.cpp
utils/autolock.cpp

Files 'bufferinfo/BufferInfoMapperMetadata.cpp' and 'utils/hwcutils.cpp' require
a lot of additional headers, therefore move them out of the scope of this commit.

'utils/gralloc.h' isn't planned to use in pure-linux builds, therefore remove
it from 'utils' and put it into '.ci/android_headers/hardware/'

Fix minor tidy fails.

Fix linux build fails (missing includes) due to differences between libc and
bionic.

Comment-out some sections in 'tests/test_include' which aren't used by drm_hwc
but causing build failures for CI due to missing dependencies.

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-by: Matvii Zorin <matvii.zorin@globallogic.com>
diff --git a/backend/Backend.cpp b/backend/Backend.cpp
index 3505385..9e9e2b9 100644
--- a/backend/Backend.cpp
+++ b/backend/Backend.cpp
@@ -16,6 +16,8 @@
 
 #include "Backend.h"
 
+#include <climits>
+
 #include "BackendManager.h"
 #include "bufferinfo/BufferInfoGetter.h"
 
@@ -117,7 +119,7 @@
   int client_start = -1;
   size_t client_size = 0;
 
-  for (auto &[z_order, layer] : z_map) {
+  for (const auto &[z_order, layer] : z_map) {
     if (IsClientLayer(display, layer)) {
       if (client_start < 0)
         client_start = (int)z_order;
@@ -137,7 +139,9 @@
           display->resource_manager()->ForcedScalingWithGpu());
 }
 
-// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
+// clang-format off
+// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables, cert-err58-cpp)
 REGISTER_BACKEND("generic", Backend);
+// clang-format on
 
 }  // namespace android