DO NOT MERGE. KEY_INTENT shouldn't grant permissions.

KEY_INTENT has no business granting any Uri permissions, so remove
any grant flags that malicious apps may have tried sneaking in.

Test: builds, boots
Bug: 32990341, 32879915
Change-Id: I657455a770c81f045ccce6abbd2291407a1cfb42
(cherry picked from commit c4f4dfedf8c961b7156fd3b98a4facacfa9002ff)

services/core/java/com/android/server/accounts/AccountManagerService.java

diff --git a/services/core/java/com/android/server/accounts/AccountManagerService.java b/services/core/java/com/android/server/accounts/AccountManagerService.java
index 747ddc2..8e4814d 100644
--- a/services/core/java/com/android/server/accounts/AccountManagerService.java
+++ b/services/core/java/com/android/server/accounts/AccountManagerService.java
@@ -3846,6 +3846,10 @@
         protected void checkKeyIntent(
                 int authUid,
                 Intent intent) throws SecurityException {
+            intent.setFlags(intent.getFlags() & ~(Intent.FLAG_GRANT_READ_URI_PERMISSION
+                    | Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                    | Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION
+                    | Intent.FLAG_GRANT_PREFIX_URI_PERMISSION));
             long bid = Binder.clearCallingIdentity();
             try {
                 PackageManager pm = mContext.getPackageManager();