AKT1 and lung cancer: In human non‐small cell lung cancer resistant to cisplatin A549/cis and H1299/cis cells with greater resistance to cisplatin, deoxyshikonin contributes to cisplatin‐induced apoptosis and inhibition of cell viability by reducing the expression of the Akt‐mediated adenosine triphosphate (ATP) binding cassette subfamily B member 1.24