Convert Android LLM extension from Java to Kotlin (#19211) #352

Job	Run time
test-riscv (llama2, true, false) / run / linux-job	12m 59s
test-riscv (mv2, false, false) / run / linux-job	11m 55s
test-riscv (mobilebert, false, false) / run / linux-job	11m 27s
test-riscv (resnet18, true, false) / run / linux-job	15m 41s
test-riscv (resnet18, true, true) / run / linux-job	13m 49s
test-riscv (mv2, true, false) / run / linux-job	13m 31s
test-riscv (mobilebert, true, true) / run / linux-job	13m 6s
test-riscv (add, false, false) / run / linux-job	11m 35s
test-riscv (mobilebert, true, false) / run / linux-job	13m 8s
test-riscv (add, true, false) / run / linux-job	12m 17s
test-riscv (mv2, true, true) / run / linux-job	13m 56s
test-riscv (llama2, false, false) / run / linux-job	11m 18s
test-riscv (llama2, true, true) / run / linux-job	12m 58s
test-riscv (resnet18, false, false) / run / linux-job	12m 35s
	3h 0m 15s

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