1、 The following error is reported in the single compilation systemui:

eworks/base/packages/SystemUI/SystemUI-tests/android_common/javac/srcjars"
frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardBouncerTest.java:382: Error: Symbol not found
        when(mUnlockMethodCache.isUnlockingWithFacePossible()).thenReturn(true);
                               ^
  Symbol: method isUnlockingWithFacePossible()
  Location: Variable of type UnlockMethodCache mUnlockMethodCache
frameworks/base/packages/SystemUI/tests/src/com/android/systemui/utils/leaks/FakeHotspotController.java:22: Error: FakeHotspotController is not abstract, and does not override the abstract method isHotspotEnabling() in HotspotController
public class FakeHotspotController extends BaseLeakChecker<Callback> implements HotspotController {
       ^
Note: Some input files use or override deprecated APIs.
Note: For more information, please recompile with -Xlint:deprecation.
Note: Some input files use unchecked or unsafe operations.
Note: For more information, please recompile with -Xlint:unchecked.
2 errors
16:19:16 ninja failed with: exit status 1

Reason:
the error in tests may be the reason why Google has not updated it, so the whole system will not prompt an error during compilation. This error does not affect the subsequent use of
solutions:
error 1: isunlockingwithfacepossible() directly modifies the place where the method is called to false
error 2: the method is not rewritten ishhotspotenabling()
fakehotspotcontroller rewrites the ishhotspotenabling() method in this class

 @Override
    public boolean isHotspotEnabling() {
        return false;
    }