GameNativeX64 Linux session: DRM playback through session is working now. Widevine supported.

Other updates include:

Add Mozilla APT and drop snap stubs for Linux Apps browsers. (7e87da44)
Document LSFG-VK x86_64 enablement and DRI3 smoke checks. (fa70b9a3)
Fix blank DRI3 presents by advertising LINEAR only until tiled import works. (a482e266)
Add redeployable vkcube-debug Custom Game for DRI3 present testing. (c7c417a9)
Rebuild x86_64 JNI prebuilts for DRI3 dma-buf zero-copy. (c7d506de)
Add x86 DRI3 GPU zero-copy via AHB/Vulkan dma-buf import. (b8f56a11)
Fix XServerPointerPolicyTest UnsatisfiedLinkError on host JVM. (bc2b8cbc)
Add BLISS_PORT_DEBUG GPU sampler smoke and bump to 67. (1151c861)
Add Intel DRM GPU MHz and frequency-ratio load stand-in. (5699ffc3)
Add DRI3 1.2 linear dma-buf present path for x86_64. (64892cc2)
Update lsfg-vk-android for WineVulkan GPA and hot-reload safety. (cc3814ab)
Enable LSFG-VK on x86_64 with lsfg-vk-android v1.0.4-android. (c4d62a88)