Reland "EGL BlobCache: Support multifile cache and flexible size limit"

This reverts commit 82a9353d and
incorporates a change to only use the fixed upper cache limit instead
of reading one from GraphicsEnvironment.

Test: Multiple apps and ANGLE traces
Test: atest CtsSdkSandboxInprocessTests
Test: /data/nativetest64/EGL_test/EGL_test
Bug: b/246966894
Change-Id: Iae44e06377de48fe2101bf547b02d3aaf37443d9