Make bugreport activity distraction optimized.

Test: on a hawk bench
Bug: 145705569
Change-Id: I752e10e22add146d6db74d7b44baba0b10251ee7
(cherry picked from commit 60b48116e50c278cc1778730e1ea585ea3230ee9)
diff --git a/tests/BugReportApp/AndroidManifest.xml b/tests/BugReportApp/AndroidManifest.xml
index d879396..cace9f9 100644
--- a/tests/BugReportApp/AndroidManifest.xml
+++ b/tests/BugReportApp/AndroidManifest.xml
@@ -51,6 +51,7 @@
                   android:theme="@android:style/Theme.DeviceDefault.Dialog"
                   android:exported="true"
                   android:launchMode="singleInstance">
+            <meta-data android:name="distractionOptimized" android:value="true"/>
         </activity>
 
         <service android:name=".BugReportService"