Load app usage events data in the hourly job.

Test: make RunSettingsRoboTests + manual
Bug: 260964679
Change-Id: Iaccaa77bd52fb7356cdcb786c64523f21040b128

src/com/android/settings/fuelgauge/protos/Android.bp

@@ -13,4 +13,12 @@ java_library {
         type: "lite",
     },
     srcs: ["fuelgauge_usage_state.proto"],
+}
+
+java_library {
+    name: "app-usage-event-protos-lite",
+    proto: {
+        type: "lite",
+    },
+    srcs: ["app_usage_event.proto"],
 }

src/com/android/settings/fuelgauge/protos/app_usage_event.proto

@@ -0,0 +1,34 @@
+syntax = "proto2";
+
+option java_multiple_files = true;
+option java_package = "com.android.settings.fuelgauge.batteryusage";
+option java_outer_classname = "AppUsageEventProto";
+
+enum AppUsageEventType {
+  UNKNOWN = 0;
+  ACTIVITY_RESUMED = 1;
+  ACTIVITY_STOPPED = 2;
+  DEVICE_SHUTDOWN = 3;
+}
+
+message AppUsageEvent {
+  // Timestamp of the usage event.
+  optional int64 timestamp = 1;
+  // Type of the usage event.
+  optional AppUsageEventType type = 2;
+  // Package name of the app.
+  optional string package_name = 3;
+  // Instance ID for the activity. This is important for matching events of
+  // different event types for the same instance because an activity can be
+  // instantiated multiple times. Only available on Q builds after Dec 13 2018.
+  optional int32 instance_id = 4;
+  // Package name of the task root. For example, if a Twitter activity starts a
+  // Chrome activity within the same task, then while package_name is Chrome,
+  // task_root_package_name will be Twitter.
+  // Note: Activities that are task roots themselves (most activities) will have
+  // this field is populated as package_name.
+  // Note: The task root might be missing due to b/123404490.
+  optional string task_root_package_name = 5;
+  optional int64 user_id = 6;
+  optional int64 uid = 7;
+}