Expose the new brightness permissions as test APIs.

Bug: 74332874
Test: atest BrightnessTest
Change-Id: Icd341c8813a8f2e806db3f75d6b1f141b56b2911
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 7aec812..687e379 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -3088,7 +3088,8 @@
     <!-- Allows an application to collect usage infomation about brightness slider changes.
          <p>Not for use by third-party applications.</p>
          @hide
-         @SystemApi -->
+         @SystemApi
+         @TestApi -->
     <permission android:name="android.permission.BRIGHTNESS_SLIDER_USAGE"
         android:protectionLevel="signature|privileged|development" />
 
@@ -3101,7 +3102,8 @@
 
     <!-- Allows an application to modify the display brightness configuration
          @hide
-         @SystemApi -->
+         @SystemApi
+         @TestApi -->
     <permission android:name="android.permission.CONFIGURE_DISPLAY_BRIGHTNESS"
         android:protectionLevel="signature|privileged|development" />