Add WEB session tag for brower's power hint session control.

Bug: 382772772
Test: build
Flag: EXEMPT HAL interface change
Change-Id: I1c2df4f1b881c5505d1dd302f6b73c17e4f479df
diff --git a/power/aidl/aidl_api/android.hardware.power/current/android/hardware/power/SessionTag.aidl b/power/aidl/aidl_api/android.hardware.power/current/android/hardware/power/SessionTag.aidl
index 71da2d4..62a84c7 100644
--- a/power/aidl/aidl_api/android.hardware.power/current/android/hardware/power/SessionTag.aidl
+++ b/power/aidl/aidl_api/android.hardware.power/current/android/hardware/power/SessionTag.aidl
@@ -40,4 +40,5 @@
   GAME,
   APP,
   SYSUI,
+  WEB,
 }
diff --git a/power/aidl/android/hardware/power/SessionTag.aidl b/power/aidl/android/hardware/power/SessionTag.aidl
index e98cc77..d1663a8 100644
--- a/power/aidl/android/hardware/power/SessionTag.aidl
+++ b/power/aidl/android/hardware/power/SessionTag.aidl
@@ -51,4 +51,9 @@
      * This tag is used to mark hint sessions created by the system UI.
      */
     SYSUI,
+
+    /**
+     * This tag is used to mark hint sessions created by the web browers.
+     */
+    WEB,
 }