Add DaydreamVR native libraries and services

Upstreaming the main VR system components from master-dreamos-dev
into goog/master.

Bug: None
Test: `m -j32` succeeds. Sailfish boots and basic_vr sample app works
Change-Id: I853015872afc443aecee10411ef2d6b79184d051
diff --git a/libs/vr/libeds/display_metrics.cpp b/libs/vr/libeds/display_metrics.cpp
new file mode 100644
index 0000000..e129395
--- /dev/null
+++ b/libs/vr/libeds/display_metrics.cpp
@@ -0,0 +1,30 @@
+#include "include/private/dvr/display_metrics.h"
+
+namespace android {
+namespace dvr {
+
+DisplayMetrics::DisplayMetrics(vec2i size_pixels, vec2 meters_per_pixel,
+                               float border_size_meters,
+                               float frame_duration_seconds,
+                               DisplayOrientation orientation)
+    : size_pixels_(size_pixels),
+      meters_per_pixel_(meters_per_pixel),
+      border_size_meters_(border_size_meters),
+      frame_duration_seconds_(frame_duration_seconds),
+      orientation_(orientation) {}
+
+void DisplayMetrics::ToggleOrientation() {
+  std::swap(size_pixels_[0], size_pixels_[1]);
+  std::swap(meters_per_pixel_[0], meters_per_pixel_[1]);
+  if (orientation_ == DisplayOrientation::kPortrait)
+    orientation_ = DisplayOrientation::kLandscape;
+  else
+    orientation_ = DisplayOrientation::kPortrait;
+}
+
+DisplayMetrics::DisplayMetrics()
+    : DisplayMetrics(vec2i(0, 0), vec2(0.0f, 0.0f), 0.0f, 0.0f,
+                     DisplayOrientation::kLandscape) {}
+
+}  // namespace dvr
+}  // namespace android