Experience orbs are destroyed by mob explosions when the `mob_griefing` game rule is set to false

The Bug:

Experience orbs are destroyed by mob explosions when the mob_griefing game rule is set to false.

When the mob_griefing game rule is set to false, a mob explosion doesn’t destroy dropped items, item frames, paintings, armor stands, minecarts or boats, however, experience orbs are destroyed which definitely doesn’t seem right.

Steps to Reproduce:

1. Set the “mob_griefing” game rule to false by using the command provided below.

   /gamerule mob_griefing false

2. Summon a creeper and obtain some flint and steel.

3. Throw a bunch of bottle o' enchanting on the ground so that lots of experience orbs spawn.

4. Ignite the creeper and when it explodes, observe if the experience orbs are destroyed.

Observed Behavior:

Mob explosions destroy experience orbs when the mob_griefing game rule is set to false.

Expected Behavior:

Mob explosions would not destroy experience orbs when the mob_griefing game rule is set to false.