Drop support for Android 5.x

(cherry picked from commit 89619b7836)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoHeaderAdapter.kt

app/src/test/java/eu/kanade/tachiyomi/data/backup/BackupTest.kt

@@ -41,7 +41,7 @@ import uy.kohesive.injekt.api.addSingleton
  * Test class for the [LegacyBackupManager].
  * Note that this does not include the backup create/restore services.
  */
-@Config(constants = BuildConfig::class, sdk = [Build.VERSION_CODES.LOLLIPOP])
+@Config(constants = BuildConfig::class, sdk = [Build.VERSION_CODES.M])
 @RunWith(CustomRobolectricGradleTestRunner::class)
 class BackupTest {
     // Create root object

app/src/test/java/eu/kanade/tachiyomi/data/database/CategoryTest.kt

@@ -13,7 +13,7 @@ import org.junit.runner.RunWith
 import org.robolectric.RuntimeEnvironment
 import org.robolectric.annotation.Config
 
-@Config(constants = BuildConfig::class, sdk = [Build.VERSION_CODES.LOLLIPOP])
+@Config(constants = BuildConfig::class, sdk = [Build.VERSION_CODES.M])
 @RunWith(CustomRobolectricGradleTestRunner::class)
 class CategoryTest {
 

app/src/test/java/eu/kanade/tachiyomi/data/library/LibraryUpdateServiceTest.kt

@@ -28,7 +28,7 @@ import uy.kohesive.injekt.api.InjektModule
 import uy.kohesive.injekt.api.InjektRegistrar
 import uy.kohesive.injekt.api.addSingleton
 
-@Config(constants = BuildConfig::class, sdk = [Build.VERSION_CODES.LOLLIPOP])
+@Config(constants = BuildConfig::class, sdk = [Build.VERSION_CODES.M])
 @RunWith(CustomRobolectricGradleTestRunner::class)
 class LibraryUpdateServiceTest {