Convert Thermal HIDL to AIDL.

This patch converts Thermal HIDL to AIDL and adds an empty example
implementation.

Bug: b/205762943
Test: atest VtsHalThermalTargetTest
Change-Id: I0c80ac400cc41f50916dbed58bb48f878dfae17f
diff --git a/thermal/OWNERS b/thermal/OWNERS
new file mode 100644
index 0000000..7229b22
--- /dev/null
+++ b/thermal/OWNERS
@@ -0,0 +1,5 @@
+# Bug component: 826709
+
+# ADPF virtual team
+lpy@google.com
+wvw@google.com