FL7: Add MIRROR_PAD CPU reference implementation and functional testing

Also refined MIRROR_PAD specification.

Also updated sample shim driver prebuilts.

Test: NeuralNetworksTest_static --gtest_filter=*reverse_dim*:*abs*:*floor*:*log*:*rsqrt*:*sin*:*sqrt*:*mirror_pad*
Test: atest CtsNNAPITestCases -- --test-arg com.android.tradefed.testtype.GTest:native-test-flag:"--gtest_filter=*reverse_dim*:*abs*:*floor*:*log*:*rsqrt*:*sin*:*sqrt*:*mirror_pad*"
Test: atest VtsHalNeuralnetworksTargetTest -- --test-arg com.android.tradefed.testtype.GTest:native-test-flag:"--gtest_filter=*reverse_dim*:*abs*:*floor*:*log*:*rsqrt*:*sin*:*sqrt*:*mirror_pad*"

Bug: 202280925

Merged-In: Ib2b310365e76364bb7c2fa56cb73b0a788e23123
Change-Id: Ib2b310365e76364bb7c2fa56cb73b0a788e23123
(cherry picked from commit a0e7d007bf92468e890e8baf78a417fcc6ad48c4)
12 files changed