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/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index 5f5f95d..2e724da 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -664,9 +664,9 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="false">
+    <hal format="aidl" optional="false">
         <name>android.hardware.thermal</name>
-        <version>2.0</version>
+        <version>1</version>
         <interface>
             <name>IThermal</name>
             <instance>default</instance>