Reverted legacyExternalSupport change

Reverted last changes.
We moved changes from plugin to project config.xml file to get copied in Android Manifest. Otherwise this was giving some warning with other plugin during project setup.

plugin.xml

@@ -74,10 +74,6 @@
 			<activity android:label="@string/multi_app_name" android:name="com.synconset.MultiImageChooserActivity" android:theme="@android:style/Theme.Holo.Light"></activity>
 		</config-file>
 
-		<edit-config file="app/src/main/AndroidManifest.xml" mode="merge" target="/manifest/application">
-			<application android:requestLegacyExternalStorage="true" /><!--Needed for image picker to suppport target sdk 29 (Android 10)-->
-		</edit-config>
-
 		<config-file target="AndroidManifest.xml" parent="/manifest">
 		    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 		</config-file>
@@ -87,8 +83,7 @@
 
 		<source-file src="src/android/Library/src/ImageFetcher.java" target-dir="src/com/synconset"/>
 		<source-file src="src/android/Library/src/MultiImageChooserActivity.java" target-dir="src/com/synconset"/>
-
-        <source-file src="src/android/Library/res/anim/image_pop_in.xml" target-dir="res/anim"/>
+		<source-file src="src/android/Library/res/anim/image_pop_in.xml" target-dir="res/anim"/>
 		<source-file src="src/android/Library/res/drawable/grid_background.xml" target-dir="res/drawable"/>
 		<source-file src="src/android/Library/res/drawable-hdpi/image_bg.9.png" target-dir="res/drawable-hdpi"/>
 		<source-file src="src/android/Library/res/drawable-hdpi/loading_icon.png" target-dir="res/drawable-hdpi"/>