Bug 1846773 - Set adjust preinstall file path in system properties (#3093)

(cherry picked from commit 793d940ed427852ed387bf9874c28d24c84165d0)

Co-authored-by: Roger Yang <royang@mozilla.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

app/src/main/java/org/mozilla/fenix/components/metrics/AdjustMetricsService.kt

@@ -11,6 +11,7 @@ import android.util.Log
 import com.adjust.sdk.Adjust
 import com.adjust.sdk.AdjustConfig
 import com.adjust.sdk.AdjustEvent
+import com.adjust.sdk.Constants.ADJUST_PREINSTALL_SYSTEM_PROPERTY_PATH
 import com.adjust.sdk.LogLevel
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
@@ -41,6 +42,8 @@ class AdjustMetricsService(
             return
         }
 
+        System.setProperty(ADJUST_PREINSTALL_SYSTEM_PROPERTY_PATH, "/preload/etc/adjust.preinstall")
+
         val config = AdjustConfig(
             application,
             BuildConfig.ADJUST_TOKEN,