feat: Build app bundles (.aab files) (#764)

* (android) Added android bundle support

  with some corrected tests

  added bundle specific output

* with --packageType flag to have consistency with cordova-ios

* warn about missing required signing params only if at least one signing param is present

* produce error on run if packageType = bundle

* added comments relating to shelljs as suggested

* unit test case added by @brodybits - Chris Brody

* Filled in error message and unit test spec

Primary author: @breautek - Norman Breau <norman@normanbreau.com>

Co-authored-by: Norman Breau <norman@normanbreau.com>
Co-authored-by: Chris Brody <chris@brody.consulting>

spec/unit/builders/ProjectBuilder.spec.js

@@ -66,6 +66,34 @@ describe('ProjectBuilder', () => {
             expect(args[0]).toBe('cdvBuildDebug');
         });
 
+        it('should set apk release', () => {
+            const args = builder.getArgs('release', {
+                packageType: 'apk'
+            });
+            expect(args[0]).withContext(args).toBe('cdvBuildRelease');
+        });
+
+        it('should set apk debug', () => {
+            const args = builder.getArgs('debug', {
+                packageType: 'apk'
+            });
+            expect(args[0]).withContext(args).toBe('cdvBuildDebug');
+        });
+
+        it('should set bundle release', () => {
+            const args = builder.getArgs('release', {
+                packageType: 'bundle'
+            });
+            expect(args[0]).withContext(args).toBe(':app:bundleRelease');
+        });
+
+        it('should set bundle debug', () => {
+            const args = builder.getArgs('debug', {
+                packageType: 'bundle'
+            });
+            expect(args[0]).withContext(args).toBe(':app:bundleDebug');
+        });
+
         it('should add architecture if it is passed', () => {
             const arch = 'unittest';
             const args = builder.getArgs('debug', { arch });