feat: add plugin withAndroidMainActivityAttributes

[achorein]

Summary

Allow customisation of AndroidManifest.xml MainActivity attributes

  "plugins": [
    [
      "expo-share-intent",
      {
        "androidMainActivityAttributes": {
           "android:launchMode": "singleTask",
           "android:windowSoftInputMode": "adjustResize",
           "android:largeHeap": true,
           "android:hardwareAccelerated": true
        }
      }
    ]
  ]