Bug 1833452 - Fix app services autopublish when building Fenix/Focus

Moved the code into `settings.gradle` and put it inside an `allprojects`
block.  I'm not 100% sure what's going on but I think this applies the
changes to android-components projects as well.  In any case, `./gradlew
assembleDebug` now seems to pick up the local app-services code.

app/build.gradle

@@ -851,20 +851,6 @@ if (gradle.hasProperty('localProperties.dependencySubstitutions.geckoviewTopsrcd
     apply from: "${topsrcdir}/substitute-local-geckoview.gradle"
 }
 
-def appServicesSrcDir = null
-if (gradle.hasProperty('localProperties.autoPublish.application-services.dir')) {
-  appServicesSrcDir = gradle.getProperty('localProperties.autoPublish.application-services.dir')
-} else if (gradle.hasProperty('localProperties.branchBuild.application-services.dir')) {
-  appServicesSrcDir = gradle.getProperty('localProperties.branchBuild.application-services.dir')
-}
-if (appServicesSrcDir) {
-    if (appServicesSrcDir.startsWith("/")) {
-        apply from: "${appServicesSrcDir}/build-scripts/substitute-local-appservices.gradle"
-    } else {
-        apply from: "../${appServicesSrcDir}/build-scripts/substitute-local-appservices.gradle"
-    }
-}
-
 if (gradle.hasProperty('localProperties.autoPublish.glean.dir')) {
     ext.gleanSrcDir = gradle."localProperties.autoPublish.glean.dir"
     apply from: "../${gleanSrcDir}/build-scripts/substitute-local-glean.gradle"

settings.gradle

@@ -31,6 +31,20 @@ gradle.projectsLoaded { ->
                 }
             }
         }
+
+        def appServicesSrcDir = null
+        if (gradle.hasProperty('localProperties.autoPublish.application-services.dir')) {
+          appServicesSrcDir = gradle.getProperty('localProperties.autoPublish.application-services.dir')
+        } else if (gradle.hasProperty('localProperties.branchBuild.application-services.dir')) {
+          appServicesSrcDir = gradle.getProperty('localProperties.branchBuild.application-services.dir')
+        }
+        if (appServicesSrcDir) {
+            if (appServicesSrcDir.startsWith("/")) {
+                apply from: "${appServicesSrcDir}/build-scripts/substitute-local-appservices.gradle"
+            } else {
+                apply from: "${rootProject.projectDir}/${appServicesSrcDir}/build-scripts/substitute-local-appservices.gradle"
+            }
+        }
     }
 }