Refactor product inheritance for slider products

Add an additional layer of inheritance for `aosp_slider`,
`full_slider`, and `aosp_slider_hwasan`.

This change adds a common layer of inheritance for non-factory
products (slider_generic.mk). This makes it easier to configure
factory and non-factory products differently.

Non-factory `slider` products now inherits from
`device/google/raviole/slider_generic.mk` which inherit from
`device/google/raviole/device-slider.mk`.

aconfig flags: Flag: EXEMPT mechanical refactoring
build flags: Flag: EXEMPT mechanical refactoring

Bug: 338332183
Bug: 338333277
Test: lunch aosp_slider-trunk_staging-userdebug && m
      lunch full_slider-trunk_staging-userdebug && m
      lunch aosp_slider_hwasan-trunk_staging-userdebug && m
Change-Id: If0bbcdf2d4de3c2eca14e514b863f7416ef12e45
diff --git a/aosp_slider.mk b/aosp_slider.mk
index 29351f5..9e65926 100644
--- a/aosp_slider.mk
+++ b/aosp_slider.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 $(call inherit-product, device/google/gs101/aosp_common.mk)
-$(call inherit-product, device/google/raviole/device-slider.mk)
+$(call inherit-product, device/google/raviole/slider_generic.mk)
 
 PRODUCT_NAME := aosp_slider
 PRODUCT_DEVICE := slider
diff --git a/slider_generic.mk b/slider_generic.mk
new file mode 100644
index 0000000..52d2542
--- /dev/null
+++ b/slider_generic.mk
@@ -0,0 +1,17 @@
+#
+# Copyright 2024 The Android Open-Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+$(call inherit-product, device/google/raviole/device-slider.mk)