drm_hwcomposer: Move HwcDisplayConfigs out of HwcDisplay class

To reduce complexity of HwcDisplay class.

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/Android.bp b/Android.bp
index 59aa05f..8e99056 100644
--- a/Android.bp
+++ b/Android.bp
@@ -110,6 +110,7 @@
 
         "hwc2_device/DrmHwcTwo.cpp",
         "hwc2_device/HwcDisplay.cpp",
+        "hwc2_device/HwcDisplayConfigs.cpp",
         "hwc2_device/HwcLayer.cpp",
         "hwc2_device/hwc2_device.cpp",
     ],