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/2.4/vts/functional/Android.bp b/camera/provider/2.4/vts/functional/Android.bp
index f8f058e..5fb1fd8 100644
--- a/camera/provider/2.4/vts/functional/Android.bp
+++ b/camera/provider/2.4/vts/functional/Android.bp
@@ -40,6 +40,7 @@
         "android.hardware.camera.device@3.5",
 	"android.hardware.camera.metadata@3.4",
         "android.hardware.camera.provider@2.4",
+        "android.hardware.camera.provider@2.5",
         "android.hardware.graphics.allocator@2.0",
         "android.hardware.graphics.common@1.0",
         "android.hardware.graphics.mapper@2.0",