Fix DEX type name for `long`

Previous CL Ia018a5e1bd428d98e63177e905ed113298d3792f had a small
typo in which in converted type `long` to shorty `L`. This should
be `J`.

Test: manual inspecition of generated files
Bug: 64382372
Change-Id: I7d212c83734255ee2f0f08be8508656b2dae03e1
1 file changed