Moves BrightnessUtils into SettingsLib DisplayUtils.

(Renamed from DisplayDensityUtils to be more generic)

This allows the AccessibilityMenu accessibility service APK
to include a much smaller dependency static library, decreasing
the post-optimization APK size from 3mb to 200kb.

Bug: 261252772
Test: build-only changes; check local & Treehugger builds
test: inspect AccessibilityMenu APK size
Change-Id: Iad36eb739ac38d923acabe558bc8f9c0395495d3
diff --git a/packages/SettingsLib/DisplayUtils/Android.bp b/packages/SettingsLib/DisplayUtils/Android.bp
new file mode 100644
index 0000000..136f883
--- /dev/null
+++ b/packages/SettingsLib/DisplayUtils/Android.bp
@@ -0,0 +1,16 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_library {
+    name: "SettingsLibDisplayUtils",
+
+    srcs: ["src/**/*.java"],
+
+    min_sdk_version: "21",
+}