MDL-76355 lib: apply a patch to googleapi for php 8.1 compatibility

lib/google/readme_moodle.txt

@@ -43,6 +43,8 @@ Local changes (to reapply until upstream upgrades contain them):
     * MDL-73523 php80 compliance. openssl_xxx_free() methods deprecated. I've been unable to
       find any issue upstream and the current library versions are way different from the ones
       we are using here.
+    * MDL-76355 php81 compliance. Class methods require overriding methods to declare a
+      compatible return type.
 
 Information
 -----------

lib/google/src/Google/Collection.php

@@ -13,7 +13,7 @@ class Google_Collection extends Google_Model implements Iterator, Countable
 {
   protected $collection_key = 'items';
 
-  public function rewind()
+  public function rewind(): void
   {
     if (isset($this->modelData[$this->collection_key])
         && is_array($this->modelData[$this->collection_key])) {
@@ -21,34 +21,38 @@ class Google_Collection extends Google_Model implements Iterator, Countable
     }
   }
 
+  #[\ReturnTypeWillChange]
   public function current()
   {
     $this->coerceType($this->key());
     if (is_array($this->modelData[$this->collection_key])) {
       return current($this->modelData[$this->collection_key]);
     }
+    return null;
   }
 
+  #[\ReturnTypeWillChange]
   public function key()
   {
     if (isset($this->modelData[$this->collection_key])
         && is_array($this->modelData[$this->collection_key])) {
       return key($this->modelData[$this->collection_key]);
     }
+    return null;
   }
 
-  public function next()
+  public function next(): void
   {
-    return next($this->modelData[$this->collection_key]);
+    next($this->modelData[$this->collection_key]);
   }
 
-  public function valid()
+  public function valid(): bool
   {
     $key = $this->key();
     return $key !== null && $key !== false;
   }
 
-  public function count()
+  public function count(): int
   {
     if (!isset($this->modelData[$this->collection_key])) {
       return 0;
@@ -56,7 +60,7 @@ class Google_Collection extends Google_Model implements Iterator, Countable
     return count($this->modelData[$this->collection_key]);
   }
 
-  public function offsetExists($offset)
+  public function offsetExists($offset): bool
   {
     if (!is_numeric($offset)) {
       return parent::offsetExists($offset);
@@ -64,6 +68,7 @@ class Google_Collection extends Google_Model implements Iterator, Countable
     return isset($this->modelData[$this->collection_key][$offset]);
   }
 
+  #[\ReturnTypeWillChange]
   public function offsetGet($offset)
   {
     if (!is_numeric($offset)) {
@@ -73,18 +78,20 @@ class Google_Collection extends Google_Model implements Iterator, Countable
     return $this->modelData[$this->collection_key][$offset];
   }
 
-  public function offsetSet($offset, $value)
+  public function offsetSet($offset, $value): void
   {
     if (!is_numeric($offset)) {
-      return parent::offsetSet($offset, $value);
+      parent::offsetSet($offset, $value);
+      return;
     }
     $this->modelData[$this->collection_key][$offset] = $value;
   }
 
-  public function offsetUnset($offset)
+  public function offsetUnset($offset): void
   {
     if (!is_numeric($offset)) {
-      return parent::offsetUnset($offset);
+        parent::offsetUnset($offset);
+        return;
     }
     unset($this->modelData[$this->collection_key][$offset]);
   }

lib/google/src/Google/Model.php

@@ -246,11 +246,12 @@ class Google_Model implements ArrayAccess
     }
   }
 
-  public function offsetExists($offset)
+  public function offsetExists($offset): bool
   {
     return isset($this->$offset) || isset($this->modelData[$offset]);
   }
 
+  #[\ReturnTypeWillChange]
   public function offsetGet($offset)
   {
     return isset($this->$offset) ?
@@ -258,7 +259,7 @@ class Google_Model implements ArrayAccess
         $this->__get($offset);
   }
 
-  public function offsetSet($offset, $value)
+  public function offsetSet($offset, $value): void
   {
     if (property_exists($this, $offset)) {
       $this->$offset = $value;
@@ -268,7 +269,7 @@ class Google_Model implements ArrayAccess
     }
   }
 
-  public function offsetUnset($offset)
+  public function offsetUnset($offset): void
   {
     unset($this->modelData[$offset]);
   }