Camera: Add default 2.5 provider for legacy and external webcam HALs

Add 2.5 implementations, which do not support passthrough mode and
therefore doesn't need the HIDL_Fetch methods or a specially-named
-impl library in the /hw directory.  Instead, the service directly
instantiates the necessary service.

Also add VTS tests for the new notification

Test: Verify device state changes are logged by HAL
Test: Camera starts as usual with both 2.4 and 2.5 providers on
      walleye.  Camera CTS completes.
Test: New VTS tests pass
Bug: 121379978
Change-Id: I0fc99379eb7e01c5b2efb20afb5753bb6ce8b627
diff --git a/camera/provider/2.5/default/android.hardware.camera.provider@2.5-service.rc b/camera/provider/2.5/default/android.hardware.camera.provider@2.5-service.rc
new file mode 100644
index 0000000..c065815
--- /dev/null
+++ b/camera/provider/2.5/default/android.hardware.camera.provider@2.5-service.rc
@@ -0,0 +1,9 @@
+service vendor.camera-provider-2-5 /vendor/bin/hw/android.hardware.camera.provider@2.5-service
+    interface android.hardware.camera.provider@2.5::ICameraProvider legacy/0
+    interface android.hardware.camera.provider@2.4::ICameraProvider legacy/0
+    class hal
+    user cameraserver
+    group audio camera input drmrpc
+    ioprio rt 4
+    capabilities SYS_NICE
+    writepid /dev/cpuset/camera-daemon/tasks /dev/stune/top-app/tasks