Add ability to retrieve energy metrics for power rails

Added code to interface with Power Stats HAL, in order
to retrieve energy measurements for the available
rails.

Bug: 122584217
Test: Manual
Change-Id: Ia68eddf731e67896edd044cccd855543d986167b
diff --git a/src/android_internal/BUILD.gn b/src/android_internal/BUILD.gn
index 0930238..baf21a6 100644
--- a/src/android_internal/BUILD.gn
+++ b/src/android_internal/BUILD.gn
@@ -20,6 +20,7 @@
   ]
   sources = [
     "health_hal.h",
+    "power_stats_hal.h",
   ]
 }
 
@@ -34,14 +35,16 @@
   if (perfetto_build_with_android) {
     sources = [
       "health_hal.cc",
+      "power_stats_hal.cc",
     ]
     libs = [
       "android.hardware.health@2.0",
+      "android.hardware.power.stats@1.0",
       "base",
       "log",
-      "hwbinder",
       "hidlbase",
       "hidltransport",
+      "hwbinder",
       "utils",
     ]
   }