drm-hwcomposer: Build hwc3 service in Android.bp

Add a android.hardware.composer.hwc3-service.drm binary target that
builds relevant hwc3 sources and common sources.

Uses BufferInfoLibdrm. The structure of this service may need to be
looked at again to support other BufferInfo implementations.

Also update the executable name in hwc3-drm.rc to match the target name.

Signed-off-by: Drew Davenport <ddavenport@chromium.org>
Signed-off-by: Drew Davenport <ddavenport@google.com>
diff --git a/hwc3/hwc3-drm.rc b/hwc3/hwc3-drm.rc
index a634b0b..ef22730 100644
--- a/hwc3/hwc3-drm.rc
+++ b/hwc3/hwc3-drm.rc
@@ -1,4 +1,4 @@
-service vendor.hwcomposer-3 /vendor/bin/hw/android.hardware.graphics.composer3-service
+service vendor.hwcomposer-3 /vendor/bin/hw/android.hardware.composer.hwc3-service.drm
     class hal animation
     user system
     group graphics drmrpc