fix(android): 移除未使用的权限声明并添加硬件支持检查

移除AndroidManifest.xml中不再需要的权限声明和库引用
在RedScanner.java中添加硬件支持检查，当设备不支持时返回错误信息

plugin.xml

@@ -17,12 +17,5 @@
 
         <lib-file src="src/android/libsref/ScannerAPI.jar" />
 
-        <config-file target="AndroidManifest.xml" parent="/manifest/application">
-            <uses-library android:name="android.scanner.library"/>
-        </config-file>
-        <config-file target="AndroidManifest.xml" parent="/*">
-            <uses-permission android:name="android.permission.CAMERA"/>
-            <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
-        </config-file>
     </platform>
 </plugin>

src/android/cordova/plugin/redScanner/RedScanner.java

@@ -20,19 +20,30 @@ public class RedScanner extends CordovaPlugin implements DecodeInfoCallBack, Sta
     private CallbackContext cb;
     private Scanner scanner;
     private boolean isOpen = false;
+    private boolean notSupported = true;
     
 
     @Override
     protected void pluginInitialize() {
         super.pluginInitialize();
-        scanner = ScannerFactory.getScanner(cordova.getContext());
-        scanner.setDecodeInfoCallBack(this);
-        scanner.setStatusCallBack(this);
-        isOpen = scanner.open();
+        try{
+            scanner = ScannerFactory.getScanner(cordova.getContext());
+            scanner.enable();
+            scanner.setDecodeInfoCallBack(this);
+            scanner.setStatusCallBack(this);
+            isOpen = scanner.open();
+        } catch (RuntimeException e) {
+            Log.e("SCAN_PLUGIN", "pluginInitialize: "+e.getMessage());
+            notSupported = true;
+        }
     }
 
     @Override
     public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
+        if(notSupported) {
+            callbackContext.error("硬件设备不支持此功能!");
+            return false;
+        }
         if("scan".equals(action)) {
             cb = callbackContext;
             if(!isOpen) {