Don't request for write storage permissions for android 11 and above. (…

…#2277)

ground/src/main/java/com/google/android/ground/system/PermissionsManager.kt

@@ -31,7 +31,7 @@ class PermissionsManager
 @Inject
 constructor(
   @ApplicationContext private val context: Context,
-  private val activityStreams: ActivityStreams
+  private val activityStreams: ActivityStreams,
 ) {
   /**
    * Asynchronously requests the app be granted the specified permission. If the permission has
@@ -68,7 +68,7 @@ constructor(
   private suspend fun getPermissionsResult(permission: String) {
     val result = activityStreams.getNextRequestPermissionsResult(PERMISSIONS_REQUEST_CODE)
     if (!result.isGranted(permission)) {
-      throw PermissionDeniedException()
+      throw PermissionDeniedException("Permission denied: $permission")
     }
   }
 
@@ -81,4 +81,4 @@ constructor(
  * Indicates a request to grant the app permissions was denied. More specifically, it indicates the
  * requested permission was not in the list of granted permissions in the system's response.
  */
-class PermissionDeniedException : Exception()
+class PermissionDeniedException(message: String) : Exception(message)

ground/src/main/java/com/google/android/ground/ui/datacollection/tasks/photo/PhotoTaskFragment.kt

@@ -17,6 +17,7 @@ package com.google.android.ground.ui.datacollection.tasks.photo
 
 import android.Manifest
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -121,7 +122,16 @@ class PhotoTaskFragment : AbstractTaskFragment<PhotoTaskViewModel>() {
   private fun obtainCapturePhotoPermissions(onPermissionsGranted: () -> Unit = {}) {
     externalScope.launch {
       try {
-        permissionsManager.obtainPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
+
+        // From Android 11 onwards (api level 30), requesting WRITE_EXTERNAL_STORAGE permission
+        // always returns denied. By default, the app has read/write access to shared data.
+        //
+        // For more details please refer to:
+        // https://developer.android.com/about/versions/11/privacy/storage#permissions-target-11
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
+          permissionsManager.obtainPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
+        }
+
         permissionsManager.obtainPermission(Manifest.permission.CAMERA)
 
         onPermissionsGranted()