power.stats: Add power.stats HIDL interface

Initial commit defines APIS to collect on-device
power-related data.

BUG: 117424656
BUG: 111185513
Test: Compilation and device boot
Change-Id: I6e3153c9fcd2d67e4a566a4621d7aa4c01da7636
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index 619ba46..b64ff86 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -317,6 +317,14 @@
         </interface>
     </hal>
     <hal format="hidl" optional="true">
+        <name>android.hardware.power.stats</name>
+        <version>1.0</version>
+        <interface>
+            <name>IPowerStats</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+    <hal format="hidl" optional="true">
         <name>android.hardware.radio</name>
         <version>1.0-2</version>
         <interface>