Update Bazel to latest version
Update Bazel to latest version

Included changes:

  - 78eb37784adea6a7e8dd008f61917da6a0eb16a7 The great Skylark -> Starlark class migration:
  - c4dfb91dfe0adc98200e0dcceb617e29eedf65f1 Clean up after https://github.com/bazelbuild/bazel/commit...
  - 20b95dd8245b0fa57d72c68ebffac633407c07b7 Android SDK declares toolchains that should be registered.
  - c17b80e7414b082c48cdc10d1adf651785039b6b Remove Package#getEvents
  - e2f859dfc99eb25d850ce8bf1d846ec111ae76c6 bazel syntax: reduce List<Statement> copying in parser
  - e9161b0f7e10aa5b386241543f688d80f9352b88 bazel syntax: roll back commit 5e486a2bb2a79afa73f7b7fda5...
  - 8c937f3141cfda75343c34a7f9716f4ecd1657e8 Fix git_repository _error function arguments to string co...
  - 1e00502c27140739f800bc7ed43f19f0c19ae529 Clean up how android repos end in the distfile
  - 2af3de3d5d1190c4daf26ee265006fe57f7358f3 Remove old incompatible option --incompatible_symlinked_s...
  - 0ebb2714a5e95630a9a4d6af3719338f71dde1f2 Remove @jin from Bazel Android rules CODEOWNERS
  - 45afb84d2eb0289cbdd9053ec4f6a2dc7fcef520 Internal change.

BAZEL_VERSION_REV_ID: 78eb37784adea6a7e8dd008f61917da6a0eb16a7
Change-Id: I271b2fb70cdc9f9ed6436b516b085d4df78521ae

google/copybara,google/copybara,google/copybara