DSU installation service: Add event log tags

Log important events to the 'events' buffer so other tools can robustly
and progmatically parse the DSU logs.

Bug: 224909776
Test: adb logcat -b events -v descriptive \
  '*:S dsu_progress_update dsu_install_complete dsu_install_failed'
Change-Id: Iac8d3ec31f51eb9410eb631487e26b4ccb0ccf81
diff --git a/packages/DynamicSystemInstallationService/Android.bp b/packages/DynamicSystemInstallationService/Android.bp
index ad86f46..b8f54b3 100644
--- a/packages/DynamicSystemInstallationService/Android.bp
+++ b/packages/DynamicSystemInstallationService/Android.bp
@@ -22,6 +22,9 @@
     defaults: ["platform_app_defaults"],
 
     srcs: ["src/**/*.java"],
+    static_libs: [
+        "DynamicSystemInstallationService-logtags",
+    ],
     resource_dirs: ["res"],
 
     certificate: "platform",
@@ -32,3 +35,8 @@
         enabled: false,
     },
 }
+
+java_library {
+    name: "DynamicSystemInstallationService-logtags",
+    srcs: ["src/**/*.logtags"],
+}