Problem: Using intellij/android studio for bluetooth package results
in intellij file artifacts getting created.

Solution: Update .gitignore to ignore intellij files

Bug: 268550806
Test: no new-test
Tag: #refactor
Change-Id: Ie381c6483dc12594039553025278957f823ce450

Bug: 190219048
Test: vim
Tag: #refactor

Change-Id: I85c4956101fd8e5be3dd37fa76af3e1afe2a1423

We should ignore the .vscode folder.
Then we can use VS code to edit the code or read
these code.

Change-Id: Icae5b3a2f5791d6c1ae27a364a2599db138eab67

This updates .gitignore to ignore files related to clangd language
server.

Added the following to .gitignore:
* compile_commands.json: Generated by ninja or other build tools to be
  used by C/C++ clangd.
* .cache: Cache folder of clangd

Bug: 176837458
Tag: #floss
Test: Manual - Use clangd with vim

Change-Id: Ic25fc5670ae67ca920402a7a918d8e1eb9a9f3c2

Add cscope and vim swap files

Bug: 190219048
Test: vim
Tag: #refactor
Change-Id: Ib91792f9a60e3965f6916c891d349d28bf08e276

Bug: 176847216
Tag: #floss
Test: atest --host bluetooth_test_gd

Change-Id: I3ccf85d54493630257957a1c5182e54470bcb16f

Added tinyxml2 as a secondary source. Moved //build/secondary/testing to
//build/secondary/third_party in the process. This means that all third_party
sources (gtest, tinyxml2) should be placed in a top-level third_party directory.

BUG=21339022

Change-Id: If324ef1eb0d5061e005f62a80d23fef25e7e78a4

As a temporary solution, this CL introduces gtest as a secondary build
source. For now, gtest can be included in testonly targets as a direct
GN target dependency, by placing the gtest source under "testing/gtest"
at the root of the tree.

Moving forward, we can use solutions like gclient to pull in external
dependencies such as gtest, or we can depend on it being available on
the system.

BUG=21339022,21340407

Change-Id: I80ab3a81a53d7c29d54857a8d0cd9677fed77549

BUG=20491586