For #10691 - Turn on LeakCanary by default for debug builds

app/src/debug/java/org/mozilla/fenix/DebugFenixApplication.kt

@@ -13,7 +13,7 @@ class DebugFenixApplication : FenixApplication() {
 
     override fun setupLeakCanary() {
         val isEnabled = PreferenceManager.getDefaultSharedPreferences(this)
-            .getBoolean(getPreferenceKey(R.string.pref_key_leakcanary), false)
+            .getBoolean(getPreferenceKey(R.string.pref_key_leakcanary), true)
 
         updateLeakCanaryState(isEnabled)
     }

app/src/main/res/xml/preferences.xml

@@ -133,7 +133,7 @@
             android:title="@string/preferences_addons" />
 
         <androidx.preference.SwitchPreference
-            android:defaultValue="false"
+            android:defaultValue="true"
             android:icon="@drawable/ic_info"
             android:key="@string/pref_key_leakcanary"
             android:title="@string/preference_leakcanary"

buildSrc/src/main/java/Dependencies.kt

@@ -7,7 +7,7 @@ object Versions {
     const val coroutines = "1.3.3"
     const val android_gradle_plugin = "3.5.0"
     const val sentry = "1.7.10"
-    const val leakcanary = "2.2"
+    const val leakcanary = "2.3"
     const val leanplum = "5.2.3"
     const val osslicenses_plugin = "0.9.5"
     const val osslicenses_library = "17.0.0"