Revert "Drop support for Android 5.x"

This reverts commit 443024cebb. Guess I'll do this a bit later so scb can get another major update first.

April Fools or whatever.

app/src/main/java/eu/kanade/tachiyomi/widget/ElevationAppBarLayout.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.widget
 import android.animation.ObjectAnimator
 import android.animation.StateListAnimator
 import android.content.Context
+import android.os.Build
 import android.util.AttributeSet
 import com.google.android.material.R
 import com.google.android.material.appbar.AppBarLayout
@@ -19,7 +20,12 @@ class ElevationAppBarLayout @JvmOverloads constructor(
     }
 
     fun enableElevation(liftOnScroll: Boolean) {
-        setElevation(liftOnScroll)
+        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP) {
+            // Delay to avoid crash
+            post { setElevation(liftOnScroll) }
+        } else {
+            setElevation(liftOnScroll)
+        }
     }
 
     private fun setElevation(liftOnScroll: Boolean) {

app/src/main/java/eu/kanade/tachiyomi/widget/RevealAnimationView.kt

@@ -49,8 +49,10 @@ class RevealAnimationView @JvmOverloads constructor(context: Context, attrs: Att
      * @param centerX x starting point
      * @param centerY y starting point
      * @param listener animation listener
+     *
+     * @return sdk version lower then 21
      */
-    fun showRevealEffect(centerX: Int, centerY: Int, listener: Animator.AnimatorListener) {
+    fun showRevealEffect(centerX: Int, centerY: Int, listener: Animator.AnimatorListener): Boolean {
         this.isVisible = true
 
         val height = this.height
@@ -69,5 +71,6 @@ class RevealAnimationView @JvmOverloads constructor(context: Context, attrs: Att
 
         anim.addListener(listener)
         anim.start()
+        return true
     }
 }