Revert "Drop connection when atttempting to disable encryption"

Bug: 259631398

This reverts commit c5eee33a.

Reason for revert: Causing b/259631398. Connection will be terminated unexpectedly when connection is in the middle of role switching with the device that does not support EPR.

Test: Regression test
Change-Id: I063e31fd74a8b319439386ecde4ce1a633b6d7bf
Merged-In: I063e31fd74a8b319439386ecde4ce1a633b6d7bf
(cherry picked from commit b2156728)

system/stack/acl/btm_acl.cc

@@ -630,21 +630,6 @@ void btm_acl_encrypt_change(uint16_t handle, uint8_t status,
     return;
   }
 
-  /* if we are trying to drop encryption on an encrypted connection, drop the
-   * connection */
-  if (p->is_encrypted && !encr_enable) {
-    android_errorWriteLog(0x534e4554, "251436534");
-    LOG(ERROR) << __func__
-               << " attempting to decrypt encrypted connection, disconnecting. "
-                  "handle: "
-               << loghex(handle);
-
-    acl_disconnect_from_handle(handle, HCI_ERR_HOST_REJECT_SECURITY,
-                               "stack::btu::btu_hcif::read_drop_encryption "
-                               "Connection Already Encrypted");
-    return;
-  }
-
   p->is_encrypted = encr_enable;
 
   /* Process Role Switch if active */