Android Studio 3.1 Beta 3 发布，此版本主要是修复常见错误：
Issue#72082657: "Unable to find manifest output" after update to 3.1.0-alpha08(canary-8)
Issue#72758525: Verifier rejected class C0: float C0.M6() failed to verify: float C0.M6(): [0xB] copy1 v1<-v0 type=Imprecise Constant: -128
Issue#72811434: D8 seems to mistakenly remove an infinite loop during compilation
Issue#72258872: Lint is wrongly detecting "CheckResult" in Kotlin code
Issue#72509078: HalfFloat false positive on converting short into Half using its APIs.
Issue#72581487: Bug: Elvis operator on cursor initialization -> "Missing recycle() calls" warning
Issue#72685131: ObsoleteSdkInt check does not flag == comparisons against APIs lower than min SDK.
Issue#72753926: Remove lint check for targetSdkVersion != Support Library version