Add thermal HAL APEX

This is used by Cuttlefish as of now.

Bug: 300011386
Test: VtsHalThermalTargetTest
Change-Id: I814d007df40d77e7fd723fd67687ef663dbb050c
diff --git a/thermal/aidl/default/apex_manifest.json b/thermal/aidl/default/apex_manifest.json
new file mode 100644
index 0000000..80420d5
--- /dev/null
+++ b/thermal/aidl/default/apex_manifest.json
@@ -0,0 +1,4 @@
+{
+    "name": "com.android.hardware.thermal",
+    "version": 1
+}