Merge "appops: Update checkOp docs" into main

     * Do a quick check for whether an application might be able to perform an operation.

     * Do a quick check for whether an application might be able to perform an operation.

     * This is <em>not</em> a security check; you must use {@link #noteOp(String, int, String,

     * This is <em>not</em> a security check; you must use {@link #noteOp(String, int, String,

     * String, String)} or {@link #startOp(String, int, String, String, String)} for your actual

     * String, String)} or {@link #startOp(String, int, String, String, String)} for your actual

     * security checks, which also ensure that the given uid and package name are consistent. This

     * security checks. This function can just be used for a quick check to see if an operation has

     * function can just be used for a quick check to see if an operation has been disabled for the

     * been disabled for the application, as an early reject of some work.  This does not modify the

     * application, as an early reject of some work.  This does not modify the time stamp or other

     * time stamp or other data about the operation.

     * data about the operation.

     *

     * <p>Important things this will not do (which you need to ultimate use

     * {@link #noteOp(String, int, String, String, String)} or

     * {@link #startOp(String, int, String, String, String)} to cover):</p>

     * <ul>

     *     <li>Verifying the uid and package are consistent, so callers can't spoof

     *     their identity.</li>

     *     <li>Taking into account the current foreground/background state of the

     *     app; apps whose mode varies by this state will always be reported

     *     as {@link #MODE_ALLOWED}.</li>

     * </ul>

     *

     *

     * @param op The operation to check.  One of the OPSTR_* constants.

     * @param op The operation to check.  One of the OPSTR_* constants.

     * @param uid The user id of the application attempting to perform the operation.

     * @param uid The user id of the application attempting to perform the operation.