Projucer: add "Custom gradle.settings content" field to Android exporter.

extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Android.h

@@ -97,7 +97,7 @@ public:
 
     //==============================================================================
     ValueWithDefault androidJavaLibs, androidAdditionalJavaFolders, androidAdditionalResourceFolders, androidRepositories, androidDependencies, androidScreenOrientation,
-                     androidCustomActivityClass, androidCustomApplicationClass, androidManifestCustomXmlElements, androidVersionCode,
+                     androidCustomActivityClass, androidCustomApplicationClass, androidManifestCustomXmlElements, androidGradleSettingsContent, androidVersionCode,
                      androidMinimumSDK, androidTargetSDK, androidTheme, androidSharedLibraries, androidStaticLibraries, androidExtraAssetsFolder,
                      androidOboeRepositoryPath, androidInternetNeeded, androidMicNeeded, androidCameraNeeded, androidBluetoothNeeded, androidExternalReadPermission,
                      androidExternalWritePermission, androidInAppBillingPermission, androidVibratePermission, androidOtherPermissions,
@@ -116,6 +116,7 @@ public:
           androidCustomActivityClass           (settings, Ids::androidCustomActivityClass,           getUndoManager(), getDefaultActivityClass()),
           androidCustomApplicationClass        (settings, Ids::androidCustomApplicationClass,        getUndoManager(), getDefaultApplicationClass()),
           androidManifestCustomXmlElements     (settings, Ids::androidManifestCustomXmlElements,     getUndoManager()),
+          androidGradleSettingsContent         (settings, Ids::androidGradleSettingsContent,         getUndoManager(), isLibrary() ? "include ':lib'" : "include ':app'"),
           androidVersionCode                   (settings, Ids::androidVersionCode,                   getUndoManager(), "1"),
           androidMinimumSDK                    (settings, Ids::androidMinimumSDK,                    getUndoManager(), "16"),
           androidTargetSDK                     (settings, Ids::androidTargetSDK,                     getUndoManager(), "28"),
@@ -204,7 +205,7 @@ public:
         removeOldFiles (targetFolder);
         copyExtraResourceFiles();
 
-        writeFile (targetFolder, "settings.gradle",                          isLibrary() ? "include ':lib'" : "include ':app'");
+        writeFile (targetFolder, "settings.gradle",                          androidGradleSettingsContent.get().toString());
         writeFile (targetFolder, "build.gradle",                             getProjectBuildGradleFileContent());
         writeFile (appFolder,    "build.gradle",                             getAppBuildGradleFileContent (modules));
         writeFile (targetFolder, "local.properties",                         getLocalPropertiesFileContent());
@@ -990,6 +991,9 @@ private:
                    "If adding any java libs in \"Java libraries to include\" setting, do not add them here as "
                    "they will be added automatically.");
 
+        props.add (new TextPropertyComponent (androidGradleSettingsContent, "Custom gradle.settings content", 32768, true),
+                   "You can customize the content of settings.gradle here");
+
         props.add (new ChoicePropertyComponent (androidScreenOrientation, "Screen Orientation",
                                                 { "Portrait and Landscape", "Portrait", "Landscape" },
                                                 { "unspecified",            "portrait", "landscape" }),

extras/Projucer/Source/Utility/Helpers/jucer_PresetIDs.h

@@ -213,6 +213,7 @@ namespace Ids
     DECLARE_ID (androidInternetNeeded);
     DECLARE_ID (androidArchitectures);
     DECLARE_ID (androidManifestCustomXmlElements);
+    DECLARE_ID (androidGradleSettingsContent);
     DECLARE_ID (androidCustomStringXmlElements);
     DECLARE_ID (androidBluetoothNeeded);
     DECLARE_ID (androidExternalReadNeeded);