Fix proguard rule for CtsCurrentApiSignatureTestCases

Test: atest CtsCurrentApiSignatureTestCases:android.signature.cts.api.current.SignatureTest#testSignature -- --abi x86_64
Bug: 201800458
Bug: 205200794
Change-Id: I5493d3283b1a5259d13fcf43f29891222e419c3b
1 file changed