docs: Fix Frame Processor install step and QualityPrioritization Order (#451)

* fix: switched incorrect property ordering for qualityPrioritization options

fix: added extra step required for create frame processing plugin on Android

* fix: adjusted the highlighted line

* chore: added guidelines on how to generate and check docs updares

* chore: change instructions so they aren't so unnecessarily wordy! :P

docs/docs/guides/FRAME_PROCESSOR_CREATE_PLUGIN_ANDROID.mdx

@@ -75,6 +75,19 @@ public class QRCodeFrameProcessorPluginPackage implements ReactPackage {
 }
 ```
 
+6. Register the package in MainApplication.java
+
+```java {6}
+        @Override
+        protected List<ReactPackage> getPackages() {
+          @SuppressWarnings("UnnecessaryLocalVariable")
+          List<ReactPackage> packages = new PackageList(this).getPackages();
+          ...
+          packages.add(new QRCodeFrameProcessorPluginPackage()); // <- add
+          return packages;
+        }
+```
+
 </TabItem>
 <TabItem value="kotlin">
 
@@ -121,6 +134,19 @@ class QRCodeFrameProcessorPluginPackage : ReactPackage {
 }
 ```
 
+6. Register the package in MainApplication.java
+
+```java {6}
+        @Override
+        protected List<ReactPackage> getPackages() {
+          @SuppressWarnings("UnnecessaryLocalVariable")
+          List<ReactPackage> packages = new PackageList(this).getPackages();
+          ...
+          packages.add(new QRCodeFrameProcessorPluginPackage()); // <- add
+          return packages;
+        }
+```
+
 </TabItem>
 </Tabs>