chore: Upgrade CameraX to alpha09 (#472)

* chore: Upgrade CameraX to alpha09

* Remove custom ProGuard file

It's no longer needed, CameraX now ships one.

* Set `targetSdkVersion` to `31`

* set `compileSdkVersion` to 31

* Add `android:exported=false`

example/android/app/src/debug/AndroidManifest.xml

@@ -5,6 +5,8 @@
     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
 
     <application android:usesCleartextTraffic="true" tools:targetApi="28" tools:ignore="GoogleAppIndexingWarning">
-        <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />
+        <activity
+          android:name="com.facebook.react.devsupport.DevSettingsActivity"
+          android:exported="false" />
     </application>
 </manifest>

example/android/app/src/main/AndroidManifest.xml

@@ -32,7 +32,8 @@
         android:launchMode="singleTask"
         android:windowSoftInputMode="adjustResize"
         android:screenOrientation="portrait"
-        android:fitsSystemWindows="false">
+        android:fitsSystemWindows="false"
+        android:exported="false">
         <intent-filter>
             <action android:name="android.intent.action.MAIN" />
             <category android:name="android.intent.category.LAUNCHER" />

example/android/build.gradle

@@ -5,8 +5,8 @@ buildscript {
         RNNKotlinVersion = "1.3.61"
         buildToolsVersion = "30.0.2"
         minSdkVersion = 21
-        compileSdkVersion = 30
-        targetSdkVersion = 30
+        compileSdkVersion = 31
+        targetSdkVersion = 31
         ndkVersion = "21.4.7075529"
     }
     repositories {