Support VIEW intents on Android. (#1799)

* Add Drop file event support for android.

* Updated MIME type configuration and intent filter generation.

* "supportedMimeTypes" => "mimeType"

* `mimeType` -> `accept-file-intent`

templates/android/template/app/src/main/AndroidManifest.xml

@@ -25,6 +25,16 @@
 
 			</intent-filter>
 
+			::foreach ANDROID_ACCEPT_FILE_INTENT::
+			<intent-filter>
+
+				<action android:name="android.intent.action.VIEW" />
+				<category android:name="android.intent.category.DEFAULT" />
+				<data android:mimeType="::__current__::" />
+
+			</intent-filter>
+			::end::
+
 		</activity>
 
 	</application>