Add process name to application info (#6890)

Leverage on `ProcessDetailsProvider` to retrieve process name info

Author: themiswang

firebase-perf/src/main/java/com/google/firebase/perf/transport/TransportManager.java

@@ -14,6 +14,7 @@
 
 package com.google.firebase.perf.transport;
 
+import static com.google.firebase.sessions.ProcessDetailsProvider.getProcessDetailsProvider;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.concurrent.TimeUnit.MINUTES;
 
@@ -230,6 +231,8 @@ private void finishInitialization() {
     applicationInfoBuilder = ApplicationInfo.newBuilder();
     applicationInfoBuilder
         .setGoogleAppId(firebaseApp.getOptions().getApplicationId())
+        .setProcessName(
+            getProcessDetailsProvider().getCurrentProcessDetails(appContext).getProcessName())
         .setAndroidAppInfo(
             AndroidApplicationInfo.newBuilder()
                 .setPackageName(packageName)

firebase-perf/src/main/proto/firebase/perf/v1/perf_metric.proto

@@ -292,7 +292,7 @@ message GaugeMetadata {
 // Additional metadata about an application and its state (including state of
 // the device at runtime) that is not provided by firebase data transport.
 //
-// Next tag: 8
+// Next tag: 9
 message ApplicationInfo {
   // Identifier for the application that has been registered with firebase.
   // Contains pantheon project number, platform and the hash of the (package
@@ -316,6 +316,9 @@ message ApplicationInfo {
 
   // A map of global-level custom attribute names to values.
   map<string, string> custom_attributes = 6;
+
+  // The name of process that initiate the event. Currently only populated for Android apps.
+  optional string process_name = 8;
 }
 
 // Additional metadata about an android application that is not provided by

firebase-perf/src/test/java/com/google/firebase/perf/transport/TransportManagerTest.java

@@ -30,6 +30,7 @@
 
 import android.content.Context;
 import android.content.pm.PackageInfo;
+import android.os.Process;
 import androidx.test.core.app.ApplicationProvider;
 import com.google.android.datatransport.TransportFactory;
 import com.google.android.gms.tasks.Tasks;
@@ -1399,6 +1400,11 @@ private void initializeTransport(boolean shouldInitialize) {
     if (shouldInitialize) {
       // Set the version name since Firebase sessions needs it.
       Context context = ApplicationProvider.getApplicationContext();
+
+      // For unit test, app context does not application info related to uid, so we have to force
+      // set it through process info.
+      context.getApplicationInfo().uid = Process.myUid();
+
       ShadowPackageManager shadowPackageManager = shadowOf(context.getPackageManager());
 
       PackageInfo packageInfo =
@@ -1468,6 +1474,8 @@ private static void validateApplicationInfo(
         .isEqualTo(FAKE_FIREBASE_APPLICATION_ID);
     assertThat(loggedPerfMetric.getApplicationInfo().getApplicationProcessState())
         .isEqualTo(applicationProcessState);
+    assertThat(loggedPerfMetric.getApplicationInfo().getProcessName())
+        .isEqualTo("com.google.firebase.perf.test");
     assertThat(loggedPerfMetric.getApplicationInfo().hasAndroidAppInfo()).isTrue();
   }
 

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/ProcessDetailsProvider.kt

@@ -28,7 +28,11 @@ import com.google.android.gms.common.util.ProcessUtils
  *
  * @hide
  */
-internal object ProcessDetailsProvider {
+object ProcessDetailsProvider {
+  @JvmStatic
+  fun getProcessDetailsProvider(): ProcessDetailsProvider {
+    return this
+  }
   /** Gets the details for all of this app's running processes. */
   fun getAppProcessDetails(context: Context): List<ProcessDetails> {
     val appUid = context.applicationInfo.uid

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/SessionEvent.kt

@@ -81,7 +81,7 @@ internal data class DataCollectionStatus(
 )
 
 /** Container for information about the process */
-internal data class ProcessDetails(
+data class ProcessDetails(
   val processName: String,
   val pid: Int,
   val importance: Int,