[Message Reader - MessageWebView]: Tall HTML emails truncated on API < 28 when content exceeds WebView rendering limit

Description

Devices running on API 27 and less, when trying to load HTML emails with content taller than ~16,384px, are truncated. The content cuts off and shows a blank space below. This affects image-heavy newsletters and long HTML emails.

This was observed on an API 26 emulator with a newsletter-style HTML email rendering to 17,738px height.

This is separate from the crash fixed in #10759, which was caused by setLayerType(LAYER_TYPE_HARDWARE) triggering a fatal BakedOpRenderer assertion.

Steps to reproduce:

1. Open a long HTML email with many images on an API <= 27 device (e.g., API 26 emulator)
2. Scroll to the bottom; the content is cut off with blank space

Expected: Full email content is visible
Actual: Content truncated at ~16,384px height

References:

• Related crash fix: #10721
• Related commit: 6a4c2d4
• GL_MAX_TEXTURE_SIZE (OpenGL ES spec): https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glGet.xhtml. Search for GL_MAX_TEXTURE_SIZE.
• Android SDK - API to query the value at runtime: GLES20.glGetIntegerv (Docs)
• Android SDK - The constant definition: GLES20.GL_MAX_TEXTURE_SIZE (Docs)

Start at the MessageWebView rendering path and reproduce the truncation on an API 26 or 27 emulator with a long, image-heavy HTML email. Read related crash fix #10721 and commit 6a4c2d4, then inspect the GLES20 GL_MAX_TEXTURE_SIZE references. Done means the full email remains visible beyond the current ~16,384px limit on affected devices.