[clang-format] Add a option for the position of Java static import

 Some Java style guides and IDEs group Java static imports after
 non-static imports. This patch allows clang-format to control
 the location of static imports.

Patch by: @bc-lee

Reviewed By: MyDeveloperDay, JakeMerdichAMD

Differential Revision: https://reviews.llvm.org/D87201