opencl: add q4_K gemm and gemv kernels for Adreno (#20919)

* opencl: add q4_K gemm and gemv kernels for Adreno

* opencl: fix whitespace

* opencl: add workarounds for compiler bugs on older devices

* opencl: handle fp16 denorm on X Elite

* opencl: fix kernel build error

* opencl: fix whitespace

* opencl: make q4_K cvt kernels signature consistent

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Co-authored-by: Li He <[email protected]>