New lint errors in Gradle 7.1.1 & Android Gradle Plugin 4.2.2

[oguzkocer]

Gradle 7.1.1 & Android Gradle Plugin 4.2.2 upgrade reports the following new issues for NewApi & ContentDescription:

../../src/main/res/values/reader_styles.xml:132: android:drawableTint requires API level 23 (current min is 21)
../../src/main/res/values/styles.xml:1395: android:drawableTint requires API level 23 (current min is 21)
../../src/main/res/values/styles.xml:76: android:windowLightStatusBar requires API level 23 (current min is 21)
../../src/main/res/values/styles.xml:213: android:windowLightStatusBar requires API level 23 (current min is 21)
../../src/main/res/values/styles.xml:226: android:windowLightStatusBar requires API level 23 (current min is 21)
../../src/main/res/values/styles.xml:221: android:windowLayoutInDisplayCutoutMode requires API level 27 (current min is 21)
../../src/main/res/values/styles.xml:225: android:windowLightNavigationBar requires API level 27 (current min is 21)
../../src/main/res/layout/media_picker_fragment.xml:10: Missing contentDescription attribute on image
../../src/main/res/layout/photo_picker_fragment.xml:10: Missing contentDescription attribute on image