internal/atlas: Reuse byte array for ReplacePixels

This reduces memory allocation at ReplacePixels.

Updates hajimehoshi#1681

internal/atlas: Bug fix: Set the minimum texture size to 8192px

Closes hajimehoshi#1675
Updates hajimehoshi#1674

internal/glfw: Bug fix: build failure with GOOS=js

Updates hajimehoshi#1672

audio/internal/readerdriver: Disable Android readerdriver

Disable Android reade rdriver, which uses OpenSL. AAudio should be
used as OpenSL causes an issue especially on Android 8.

Updates hajimehoshi#1656

Revert "tmp"

This reverts commit 9619276.

Reason: Wrong commit

Update README

audio/internal/readerdriver: Disable the reader driver for Android te…

…mporarily

Updates hajimehoshi#1549
Updates hajimehoshi#1645

audio/internal/oboe: Bug fix: Use-after-free of a player

In theory, a closed player was used unexpectedly by these steps:

  1. Suspend is called by switching the application
  2. Player_Close is called
  3. Resume is called by reactivating the application

The set of GetPlayersToResume() had a closed player and the trying to
play it caused the use-after-free problem.

This changes fixes the issue by removing the player from the set of
GetPlayerToResume() when closing it. iOS version already has the logic
to remove the player appropriately.

Updates hajimehoshi#1645
Closes hajimehoshi#1646

ebiten: Update the comments of (*Image).SubImage

Closes hajimehoshi#1643

audio: Bug fix: Compile error for tests