git: openjdk/mobile: 8242208: Use Method.getParameterCount where applicable

[duke]

Changeset: 08b90285
Author:    Christoph Dreis <christoph.dreis at freenet.de>
Committer: Claes Redestad <redestad at openjdk.org>
Date:      2020-04-06 13:46:09 +0000
URL:       https://git.openjdk.java.net/mobile/commit/08b90285

8242208: Use Method.getParameterCount where applicable

Reviewed-by: redestad, chegar

! src/java.base/share/classes/java/lang/invoke/MethodHandleProxies.java
! src/java.base/share/classes/java/lang/reflect/Executable.java
! src/java.base/share/classes/sun/reflect/annotation/AnnotationType.java