Camera: Add initial flagging support

- Add core aconfig file into frameworks/av/camera
- Add various flag libraries for use across camera stack

Test: Manual:
 - Test flag library can be called in camera service
 - Test flag can be flipped by tooling
Bug: 297375200
Change-Id: Ic008f6442a27f0fe5579a1f18b5e9470754b8db4
diff --git a/camera/camera_platform.aconfig b/camera/camera_platform.aconfig
new file mode 100644
index 0000000..fc11518
--- /dev/null
+++ b/camera/camera_platform.aconfig
@@ -0,0 +1,8 @@
+package: "com.android.internal.camera.flags"
+
+flag {
+     namespace: "camera_platform"
+     name: "initial_test_flag"
+     description: "Flag infrastructure test flag"
+     bug: "292631208"
+}