config: Update to use relative include paths

config/snippets/mainline_system.yml

@@ -1,5 +1,5 @@
 includes:
-  - snippets/base.yml
+  - base.yml
 
 filters:
   files:

config/snippets/pixel/2021.yml

@@ -4,7 +4,7 @@ platform:
     - hardware/google/pixel-sepolicy
 
 includes:
-  - snippets/pixel/common.yml
+  - common.yml
 
 filters:
   partitions:

config/snippets/pixel/common.yml

@@ -2,19 +2,19 @@ device:
   vendor: google_devices
 
 includes:
-  - snippets/mainline_system.yml
-  - snippets/gms.yml
+  - ../mainline_system.yml
+  - ../gms.yml
 
   # Irrelevant stock feature: silent factory OTAs
-  - snippets/pixel/factoryota.yml
+  - factoryota.yml
 
   # Apps that don't really need to be privileged
-  - snippets/pixel/gcam.yml
+  - gcam.yml
 
   # Pixel-exclusive features that need additional support
-  - snippets/pixel/dreamliner.yml
-  - snippets/pixel/flipendo.yml
-  - snippets/pixel/turbo.yml
+  - dreamliner.yml
+  - flipendo.yml
+  - turbo.yml
 
 filters:
   props: