Extract FoldableDeviceStateProvider to a library

Moves FoldableDeviceStateProvider to a separate
java library, so it could shared between
physical devices and cuttlefish devices.
Also makes it public (moves to AOSP).
No changes are made to the functionality,
this is just a move.

Bug: 284266229
Test: manual compile and check on a physical device
Test: presubmit
Flag: none
Change-Id: Ie7f7d334a4904bfbb19baa5dc814291828a8c9eb
diff --git a/services/foldables/devicestateprovider/Android.bp b/services/foldables/devicestateprovider/Android.bp
new file mode 100644
index 0000000..34737ef
--- /dev/null
+++ b/services/foldables/devicestateprovider/Android.bp
@@ -0,0 +1,13 @@
+package {
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+java_library {
+    name: "foldable-device-state-provider",
+    srcs: [
+        "src/**/*.java"
+    ],
+    libs: [
+        "services",
+    ],
+}