Update Android binaries to 1.3 Vulkan build with Gemma4 SDPA + RMSNorm

Rebuilt libexecutorch.so (arm64-v8a, x86_64) from the labs ExecuTorch 1.3
fork with the Gemma4 Vulkan support: aten.rms_norm lowering and the SDPA
shaders, ported onto 1.3's tile-load helper API with the DHSB Q/K/V layout
the Gemma4 export uses. Verified coherent generation on device.

Authored with Claude.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: NorbertKlockiewicz