Error Prone 2.0.19 release

[Liam Miller-Cushon]

Error Prone 2.0.19 is available for download from Maven Central.

New checks

• [AndroidInjectionBeforeSuper] enforcement of dagger.android.AndroidInjection usage

• [InvalidTimeZoneID] New check for invalid timezone identifiers.

Updates to existing checks

• ReturnValueIgnored: check for ignored return values of non-terminal stream functions

• JUnit4TestNotRun don't flag methods in abstract classes

• MethodCanBeStatic: don't report methods in inner classes

• Fix RestrictedApi with nested whitelist annotations.

• Disable SelfEquals inside assertions

• Fix a crash in VarChecker on effectively final resource variables (#498)

• Generalize IdentityBinaryExpression to handle more operators (#53)

• Fix a bug in PrivateConstructorForUtilityClass (#530)

• Merge GuardedByValidator into GuardedByChecker

• Change canonical name for GuardedByChecker to GuardedBy.

• Fix a crash in ArgumentParameterSwap (#490)

Removed checks

• Remove the MultibindsInsteadOfMultibindings check: the @dagger.Multibindings annotation is being removed

• Delete SelfEquality, which is obsolesced by IdentityBinaryExpression

• Remove GuavaSelfEquals, and the Guava equals methods are now handled by SelfEquals

Other changes

• Make -XepAllErrorsAsWarnings position-sensitive.

• Add a -XepDisableAllChecks flag to turn off all suppressible checks unless explicitly enabled. Fixes #555.

• Command line flags must now use canonical names to override or disable checks. Fixes #554

• Don't use a snapshot dependency for test_helpers (#571)