For #22138 - Install source metrics probe

app/metrics.yaml

@@ -1301,6 +1301,20 @@ metrics:
       - perf-android-fe@mozilla.com
       - mcomella@mozilla.com
     expires: "2022-02-01"
+  install_source:
+    type: string
+    lifetime: application
+    description: |
+      Used to identify the source the app was installed from.
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/22138
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/22224#issuecomment-956749994
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - android-probes@mozilla.com
+    expires: "2022-02-01"
 
 customize_home:
   most_visited_sites:

app/src/main/java/org/mozilla/fenix/FenixApplication.kt

@@ -626,6 +626,14 @@ open class FenixApplication : LocaleAwareApplication(), Provider {
 
             tabViewSetting.set(settings.getTabViewPingString())
             closeTabSetting.set(settings.getTabTimeoutPingString())
+
+            val installSourcePackage = if (SDK_INT >= Build.VERSION_CODES.R) {
+                packageManager.getInstallSourceInfo(packageName).installingPackageName
+            } else {
+                @Suppress("DEPRECATION")
+                packageManager.getInstallerPackageName(packageName)
+            }
+            installSource.set(installSourcePackage.orEmpty())
         }
 
         with(AndroidAutofill) {

app/src/test/java/org/mozilla/fenix/FenixApplicationTest.kt

@@ -4,6 +4,8 @@
 
 package org.mozilla.fenix
 
+import android.content.pm.PackageManager
+import android.os.Build
 import androidx.test.core.app.ApplicationProvider
 import io.mockk.Runs
 import io.mockk.every
@@ -32,6 +34,7 @@ import org.mozilla.fenix.components.toolbar.ToolbarPosition
 import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
 import org.mozilla.fenix.utils.BrowsersCache
 import org.mozilla.fenix.utils.Settings
+import org.robolectric.annotation.Config
 
 @RunWith(FenixRobolectricTestRunner::class)
 class FenixApplicationTest {
@@ -80,11 +83,17 @@ class FenixApplicationTest {
     }
 
     @Test
+    @Config(sdk = [Build.VERSION_CODES.O])
     fun `WHEN setStartupMetrics is called THEN sets some base metrics`() {
         val expectedAppName = "org.mozilla.fenix"
+        val expectedAppInstallSource = "org.mozilla.install.source"
         val settings: Settings = mockk()
         val application = spyk(application)
+        val packageManager: PackageManager = mockk()
 
+        every { application.packageManager } returns packageManager
+        @Suppress("DEPRECATION")
+        every { packageManager.getInstallerPackageName(any()) } returns expectedAppInstallSource
         every { browsersCache.all(any()).isDefaultBrowser } returns true
         every { mozillaProductDetector.getMozillaBrowserDefault(any()) } returns expectedAppName
         every { mozillaProductDetector.getInstalledMozillaProducts(any()) } returns listOf(expectedAppName)
@@ -168,6 +177,7 @@ class FenixApplicationTest {
         assertEquals("standard", Preferences.enhancedTrackingProtection.testGetValue())
         assertEquals(listOf("switch", "touch exploration"), Preferences.accessibilityServices.testGetValue())
         assertEquals(true, Preferences.inactiveTabsEnabled.testGetValue())
+        assertEquals(expectedAppInstallSource, Metrics.installSource.testGetValue())
 
         // Verify that search engine defaults are NOT set. This test does
         // not mock most of the objects telemetry is collected from.