Hi,

Strange issue with Lint indicating false positives on API errors (NewApi, InlinedApi or ObsoleteSdkInt) when not using directly Build.VERSION_CODES constants.

It's broken since AGP 3.3.0, worked with AGP 3.2.1 and previous versions.

Example:
```
object AndroidVersions {

const val API_28 = Build.VERSION_CODES.P

private val infoFlag: Int =
if (Build.VERSION.SDK_INT >= API_28)
PackageManager.GET_SIGNING_CERTIFICATES
else
PackageManager.GET_SIGNATURES
```
Lint report the following warning: `Warning: Unnecessary; SDK_INT is never < 21 [ObsoleteSdkInt]` which has nothing to do here.

If we wrap the condition into a method, it produces a wrong InlinedApi warning:
````

object AndroidVersions {

const val API_28 = Build.VERSION_CODES.P

inline fun hasApi28() = Build.VERSION.SDK_INT >= API_28

private val infoFlag: Int =
if (AndroidVersions.hasApi28())
PackageManager.GET_SIGNING_CERTIFICATES
else
PackageManager.GET_SIGNATURES
}

Produces `Warning: Field requires API level 28 (current min is 21): android.content.pm.PackageManager#GET_SIGNING_CERTIFICATES [InlinedApi]`

When calling a method that requires an higher API level than min SDK using this method it produces an NewApi error.

```

Configuration:
Android Studio 3.3 RC 1
Build #AI-182.5107.16.33.5138683, built on November 19, 2018
JRE: 1.8.0_152-release-1248-b01 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.14.1

Issue 120255046

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