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/Android.bp b/Android.bp
index 8395fec..31afc19 100644
--- a/Android.bp
+++ b/Android.bp
@@ -335,9 +335,11 @@
   name: "libperfetto_android_internal",
   srcs: [
     "src/android_internal/health_hal.cc",
+    "src/android_internal/power_stats_hal.cc",
   ],
   shared_libs: [
     "android.hardware.health@2.0",
+    "android.hardware.power.stats@1.0",
     "libbase",
     "libhidlbase",
     "libhidltransport",