Move getPublicFieldRecursive to native JNI

Benchmark: libcore/benchmarks/src/benchmarks/regression/ReflectionBenchmark.java

Previous benchmarks:
    Class_getField           814.26 ns; σ=6.44 ns @ 3 trials
    GetInterfaceStaticField 1552.28 ns; σ=38.22 ns @ 10 trials
    GetSuperClassField       939.85 ns; σ=2.94 ns @ 3 trials

New benchmarks:
    Class_getField           735.97 ns; σ=0.98 ns @ 3 trials
    GetInterfaceStaticField 1178.98 ns; σ=6.14 ns @ 3 trials
    GetSuperClassField       853.76 ns; σ=16.86 ns @ 10 trials

Bug: 24209213

Change-Id: I08073cb36b007ac33af010dab917a6f1e51107c0
1 file changed